SPCP858A, a new high integrated RF mouse controller solution developed by SunplusIT, is a designated design for the target fields of 2.4GHz mouse applications. The chip contains an 8-bit SUNPLUSIT CPU core with two timers, Timer0 and Timer1. Memory includes 8K bytes of OTPROM with 128 bytes of RAM (including stack buffers). In addition, it builds in a DC/DC converter and a LDO converter. The DC/DC converter can drive the maximum 90mA at 2.8v or 2.5v for off-chip applications and convert 2 batteries in series. The LDO converter can drive the maximum 5mA at 1.9v or 1.8v for external device. Furthermore, a 128-byte EEPROM is built in for users to change the vendor/product ID anytime and anywhere.
Typical Application
2.4GHz wireless optical mouse
Terms
Abbreviation
Definition
LVR
Low Voltage Reset
LVD
Low Voltage Detection
OTP
One Time Programmable
POR
Power-On Reset
SPI
Serial Peripheral Interface
Features
CPU
Built-in 8-bit SUNPLUSIT CPU core with running frequency at up to 12MHz clock rate
Memory
8KB OTPROM and 128B RAM
Built-in 128-byte EEPROM
Option bits located in the built-in EEPROM area are loaded before Power-On Reset
Power
Built-in a DC/DC converter, which can drive maximum 90mA at 2.8v or 2.5v through VDD_OUT1 for off-chip applications and convert 2 batteries in series.
Built-in a LDO converter, which can drive maximum 5mA at 1.9v or 1.8v through VDD_OUT2 for the external device
Clock
Built-in internal 6MHz oscillator and 18/24MHz PLL for outputting CLK to external mouse sensor
External 16MHz crystal
I/O
Up to 17 general purpose I/Os on 28-pin package
Programmable I/O direction with resistive pull-up/down control
One special design for clock output up to 24MHz
Memory
16K bytes program (OTP) memory
128 bytes EEPROM
512 bytes user RAM
Three 8-byte FIFOs for USB endpoints EP0, EP1 and EP2
Two 64-byte FIFOs for USB endpoints EP3 and EP4
Timer
One 14-bit free-running timer with overflow interrupt and real time interrupt
One 8-bit re-loadable timer can be cascaded as a 16-bit timer
Input Capture
Two input-capture registers
Selectable edge trigger for capture input
Pulse or period measurement
SPI
Full-duplex or half-duplex synchronous serial communication
Supports master or slave mode
Selectable transfer rate from 46.9K to 3M bps
Reset Circuit
Low Voltage Detection (LVD)
Low Voltage Reset (LVR)
Watchdog Timer Reset
Illegal Address Reset
Software Reset
Power Saving Mode
STOP mode and WAIT (schedule wakeup) mode
One internal ring oscillator which supports schedule wakeup
Solutions