XG836 is an 8-bit high performance, low cost MCU which bases on RISC architecture. It is easy to use to deal with analog signal, for example, measurement applications with sensor. The XG836 has an embedded 10-bit analog to digital converter (ADC) with 16 channels, two pulse width modulators (PWM) and one 8-bit digital to analog converter (DAC). It also improved some internal characteristics, such as Halt Function, Wake-up Function, Oscillator Selection, and Programmable Frequency Prescaler. So, XG836 is very flexible for use, and just need least extra parts for cutting down the cost. For these advantages and good characteristics, such as Integrated A/D, Integrated D/A, Integrated PWM, low cost, high performance, flexible Input/Output, and low price, XG836 is very suitable for applications such as Sensor signal process, Motor drive, Industry control, Consumed product, and subsystem controller etc.

XG836 uses Reduced Instruction Set, and it has 256 bytes RAM, the user can easily visit the ROM and RAM but no need to change program page. The special function registers have same addressing mode with RAM

XG836 is One-Time Programmable (OTP), and user’s program can be easily and effectively emulated by our emulator. It provides an effective way for users to develop their program.

2. Features

· High performance, low cost, 8-bit MCU

· Advanced RISC architecture

- 59 instructions – most of the instructions are executed within one single instruction cycle（Fosc/2）

· Peripheral Features

- One 8-bit timer with frequency prescaler

- One 8-bit pulse width comparator with frequency prescaler

- Watch dog with independent oscillator

- One external interrupt

- One Timer with frequency prescaler and interrupt function.

- Embedded crystal and RC oscillator

- Program interfaces and code protection

- Low voltage reset（LVR）

- 15 I/O ports (P6、P7、P9、PA) with wake-up function

- Two channels of PWM

- 10-bit ADC with 15 channels

- 8-bit DAC with one channel

- A set of UART interface

- Two sets of SPI interface

· Special Microcontroller Features

- Power on reset and power off detect

- Embedded, calibrated RC oscillator

- 6 hardware interrupt sources (external and internal)

- 8 levels stack

- Two sleep modes, halt and sleep to get low consumption

- Instructions are 16-bit，can visit all registers, RAM , ROM and no need to change program page

- Table read function

- Direct addressing and indirect addressing

- Bit oriented instructions

· Memory

- 4K * 16bits OTP ROM

- 256 * 8bits RAM

- 128 * 8bits Special function registers

· I/O and package

- 44 universal I/O ports

- There are two more inputs when use internal RC oscillator

· Ambient operating temperature: 0 ~ 70°C

· Operating voltage range: 2.3 ~ 5.5V

· Operating Frequency range

1. Crystal mode: DC~20MHz at 5V, DC~8MHz at 3V,

2. RC oscillator mode: 3~20MHz at 5V, 3~8MHz at 3V,

· Supply current of XG836 at 6MHz, 5V, 25°C

1. Normal Mode:

It depends on the level of the LDO,

when LDO=3volt, the operating current <1.5mA (no load and transition on all I/Os).

2. Sleep Mode:

< 4.5uA, when LDO on

< 1.5uA, when LDO off

3. Pin Assignment

Figure 3.1 Pin assignment

3.1 Pin Description

Pin name

Pin number

I/O

type

Buffer type

Function

P50

P51/AD1

P51

AD1

P52/AD2

P52

AD2

P53/AD3

P53

AD3

P54/AD4

P54

AD4

P55/AD5

P55

AD5

P56/AD6

P56

AD6

P57/AD7

P57/

AD7

I/O

TTL

P5 is general purpose bi-directional I/O port, can be pulled high by software

Digital I/O pin, or CS pin when program OTP

Digital I/O pin, or DIO1 pin when program OTP

Analog input 1

Digital I/O pin, or DIO2 pin when program OTP

Analog input 2

Digital I/O pin, or SCK pin when program OTP

Analog input 3

Digital I/O pin

Analog input 4

Digital I/O pin

Analog input 5

Digital I/O pin

Analog input 6

Digital I/O pin

Analog input 7

P60

P61

P62/SDI2

P62

SDI2

P63/SDO2

P63

SDO2

P64/SCK2

P64

SCK2

P65/SS2

P65

SS2

P66/TX

P66

P67/RX

P67

I/O

TTL

P6 is general purpose bi-directional I/O port, can be pulled high by software，can wake up MCU at low

Digital I/O pin

SPI2 data input

Digital I/O pin

SPI2 data output

Digital I/O pin

SPI2 clock output

Digital I/O pin

SPI2 slave device selection

Digital I/O pin

Serial output

Digital I/O pin

Serial input

P70/VREF

P70

VREF

P71

P72

P73

CLK/P74/P76

DATA/P75/P77

I/O

P7 is general purpose bi-directional I/O port

Digital I/O pin

AD reference voltage input, less than 3.6V

Digital I/O pin

P74 is connected with P76

P74 can be pulled high by software, can wake up MCU at low

P76 can be set as open drain by software

P75 is connected with P77

P75 can be pulled high by software, can wake up MCU at low

P77 can be set as open drain by software

P80/AD8

P80

AD8

P81/AD9

P81

AD9

P82/AD10

P82

AD10

P83/AD11

P83

AD11

P84/AD12

P84

AD12

P85/AD13

P85

AD13

P86/AD14/DAO

P86

AD14

DAO

P87/AD15

P87

AD15

I/O

TTL

General purpose bi-directional I/O port, can be pulled high by software

Digital I/O pin

Analog input 8

Digital I/O pin

Analog input 9

Digital I/O pin

Analog input 10

Digital I/O pin

Analog input 11

Digital I/O pin

Analog input 12

Digital I/O pin

Analog input 13

Digital I/O pin

Analog input 14

Analog output

Digital I/O pin

Analog input 15

P90/PWM1

P90

PWM1

P91/PWM2

P91

PWM2

P92/SDI

P92

SDI

P93/SDO

P93

SDO

P94/SCK

P94

SCK

P95/SS

P95

P96

P97

I/O

TTL

General purpose bi-directional I/O port, can be pulled high by software

Digital I/O pin, can wake up MCU at low

PWM1 output

Digital I/O pin, can wake up MCU at low

PWM2 output

Digital I/O pin,

SPI data input

Digital I/O pin,

SPI data output

Digital I/O pin,

SPI clock output

Digital I/O pin,

SPI slave device selection

Digital I/O pin,

PA0

PA1

PA2

PA3/EINT

EINT

PA3

PA4/VPP

PA4

VPP

PA5/ RESET

RESET

PA5

OSCI

OSCO / PA7

OSCO

PA7

I/O

General purpose bi-directional I/O port

Digital I/O pin, can be pulled low by software

External interrupt, internal pull-high, select as EINT when program

Digital I/O pin, can be pulled high by software

PA4 is VPP when Program OTP, input 7.3V voltage

Program pin, external reset, internal pull-high, select as RESET when program

Digital I/O pin, can be pulled high by software

Oscillator input, select as OSCI when program

Oscillator output, select as OSCO when program

Digital input, input voltage must less than 3.6V

VDD

Power supply, program pin

VDDL

IC kernel voltage output, program pin

VSS

17,44

Power ground, program pin

Note: I = Input O = Output I/O = Input/Output P = Power

- = not use TTL = TTL Input ST = Schmitt Input

3.2 PAD Assignment

Figure 3.2 Pad Assignment

Unit:μm Note: the underlay must be connected to GND

NO.	PAD NAME	NO.	PAD NAME
1	P86/AD14/DAO	26	P90/PWM1
2	P87/AD15	27	P91/PWM2
3	P50	28	P92/SDI
4	P51/AD1	29	P93/SDO
5	P52/AD2	30	P94/SCK
6	P53/AD3	31	P95/SS
7	P54/AD4	32	P96
8	P55/AD5	33	P97
9	P56/AD6	34	PA0
10	P57/AD7	35	PA1
11	P70/VREF	36	PA2
12	P71	37	PA3/EINT
13	P72	38	PA4/VPP
14	P73	39	PA5/RESET
15	CLK/P74/P76	40	VDD
16	DATA/P75/P77	41	VDDL
17	VSS	42	OSCI
18	P60	43	PA7/OSCO
19	P61	44	VSS
20	P62/SDI2	45	P80/AD8
21	P63/SDO2	46	P81/AD9
22	P64/SCK2	47	P82/AD10
23	P65/SS2	48	P83/AD11
24	P66/TX	49	P84/AD12
25	P67/RX	50	P85/AD13