Product Specification

Ps2 Interface Integrated IC Wireless Mouse Chip ROHS Certificate

Wired Wireless Mouse Chip USB Interface Integrated IC Optical Mouse Chip
 
Chip name: Optical mouse chip
Mouse chip model: GZ-P001-STC

 Function description
Timer/counter
The keyboard chip provides three 16-bit timer/counters T0, T1, T2. Each can be used as a general counter. When T0/T1/T2 is used as a timer, the time unit used to trigger the timer is the machine cycle. A machine cycle is equal to 12 or 6 oscillation cycles, depending on whether the user configures the chip to be in 12T mode or 6T mode. When T0/T1/T2 is used as a counter, the counting event is the corresponding pin of T0/T1/T2 High to low level change". In this mode, the chip samples the T0/T1/T2 pins every machine cycle. Once the result is from 1 to 0, the chip counts 1 to the counter. It should be noted that when operating as a counter, the width of the high pulse or low pulse of the T0/T1/T2 pin must be greater than one machine cycle. There are two special registers to configure T0 and T1. They are TMOD, TCON have two special registers to configure T2. They are T2MOD, T2CON
Serial port (UART)
The serial port of the mouse chip is duplex, it can send and receive data at the same time. The data sent and received share the same special register SBUF. There are actually two SBUF registers inside the chip, one for sending and one for receiving. The serial port can work in 4 different modes.
Mode 0
Usually, this mode is purely used to expand the I/O port of the chip. In this mode, both receiving and sending data pass through the RXD pin, and TXD outputs a synchronous shift clock. What is sent or received is 8-bit data, with the lowest bit first, and its baud rate is fixed at 1/12 of the MCU clock.
Mode 1
Send through TXD pin or receive 10-bit data frame through RXD pin. The data frame includes 1 start bit (0), 8 data bits, and 1 stop bit (1). After the reception is complete, the stop bit is stored in RB8 of SCON. Baud rate (mode 1) = 2SMOD X (T1 overflow rate) /32 or = T2 overflow rate /16
Mode 2
Send through TXD pin or receive 11-bit data frame on RXD pin. The data frame includes 1 start bit (0), 8 data bits, 1 programmable 9th bit and 1 stop bit (1). When sending, the 9th bit comes from TB8 of SCON. When receiving, the 9th digit will be stored in TB8 of SCON. The baud rate can be 1/32 or 1/64 of the clock frequency; baud rate (mode 2) = 2SMOD X OSC/64
Mode 3
Mode 3 is the same except that the baud rate is different from Mode 2. Baud rate (mode 3) = 2SMOD X (T1 overflow rate) /32 or = T2 overflow rate /16 For all modes, writing to SBUF will start sending. For mode 0, if RI=0 and REN=1, the reception starts. For other modes, if REN=1 and a start bit is introduced, that is, if there is a falling edge, the reception starts.
Power down mode
The user sets PCON.1 to make the chip enter the power-down mode. In power-down mode, the chip clock is stopped. The internal RAM and SFR of the chip remain unchanged. The wake-up method can be hardware reset or /INT0, /ITN1, /INT2 and /INT3 external interrupts. When the hardware is reset, pay attention to at least keep the RESET pin high for more than 10ms to stabilize the clock. The program starts to execute from address 0x0000. If it is an external interrupt wake-up, the program will jump into the interrupt vector and perform interrupt processing. In order to use an external interrupt to wake up, the external interrupt must be set correctly before entering the power-down mode.

Pin status in IDLE mode and power-down mode:

The electrical parameters of the wireless mouse:

 
 
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