668-0011 Rabbit Semiconductor, 668-0011 Datasheet - Page 198

• Manufacturer Part Number: 668-0011
• Description: IC MPU RABIT3000A 55.5MHZ128LQFP
• Manufacturer: Rabbit Semiconductor

Specifications of 668-0011

• Rohs Status: RoHS non-compliant
• Processor Type: Rabbit 3000 8-Bit
• Speed: 55.5MHz
• Voltage: 2.5V, 2.7V, 3V, 3.3V
• Mounting Type: Surface Mount
• Package / Case: 128-LQFP
• Features: -
• Other names: 316-1043

22.2 Dependencies
22.2.1 I/O Pins
Each PWM channel can be output on up one of two pins, which can be selected via the
parallel port alternate output registers.
22.2.2 Clocks
The PWM counter is clocked from the output of Timer A9, and can run at rates from
perclk/2 down to perclk/512 by writing the appropriate value to TAT9R.
22.2.3 Other Registers
22.2.4 Interrupts
The PWM can generate an interrupt for every PWM counter rollover, every second roll-
over, every fourth rollover, or every eighth rollover. This option is selected in PWL1R.
The interrupt request is cleared by a write to any PWM register.
The PWM interrupt vector is in the IIR at offset 0x170. It can be set as Priority 1, 2, or 3
by writing to PWL0R.
188
TAT9R
PDFR, PFFR, PGFR
Register
Channel 0
Channel 1
Channel 2
Channel 3
Time constant for PWM clock
Alternate port output selection
PWM
Output Pins
PF4, PG3
PF5, PG7
PF6, PD3
PF7, PD7
Rabbit 3000 Microprocessor User’s Manual
Function