PC87591L datasheet(10/437 Pages) NSC

10 / 437 page

Table of Contents (Continued)

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Revision 1.07

4.5.5

GPIO Port Pw ............................................................................................................ 118

GPIO Port Signals Shared with Development System Signals ......................... 118

4.5.6

GPIO Port Registers .................................................................................................. 119

GPIO Register Map ........................................................................................... 119

Port Alternate Function Registers (PxALT, PyALT and PzALT) ........................ 119

Port Direction Registers (PxDIR and PwDIR) .................................................... 120

Port Data Output Register (PxDOUT, PzDOUT and PwDOUT) ........................ 120

Port Data Input Registers (PxDIN, PyDIN and PwDIN) ..................................... 120

Port Weak Pull-Up Registers (PxWPU, PyWPU) .............................................. 121

4.6

PS/2 INTERFACE .................................................................................................................... 122

4.6.1

Features .................................................................................................................... 122

4.6.2

General Description ................................................................................................... 122

4.6.3

Operating With the Shift Mechanism Disabled .......................................................... 124

4.6.4

Operating With the Shift Mechanism Enabled ........................................................... 125

Receive Mode .................................................................................................... 126

Transmit Mode ................................................................................................... 127

4.6.5

PS/2 Interface Registers ............................................................................................ 128

PS/2 Register Map ............................................................................................. 129

PS/2 Data Register (PSDAT) ............................................................................. 129

PS/2 Status Register (PSTAT) .......................................................................... 129

PS/2 Control Register (PSCON) ........................................................................ 130

PS/2 Output Signal Register (PSOSIG) ............................................................. 131

PS/2 Input Signal Register (PSISIG) ................................................................. 132

PS/2 Interrupt Enable Register (PSIEN) ............................................................ 133

4.7

MULTI-FUNCTION 16-BIT TIMER (MFT16) ........................................................................... 134

4.7.1

Features .................................................................................................................... 134

4.7.2

Clock Source Unit ...................................................................................................... 135

Pre-Scaler .......................................................................................................... 135

External Event Clock ......................................................................................... 135

Pulse Accumulate Mode .................................................................................... 135

Slow-Speed Clock ............................................................................................. 135

Counter Clock Source Select ............................................................................. 136

4.7.3

Timer/Counter and Action Unit .................................................................................. 136

Operation Modes ............................................................................................... 136

Mode 1, PWM and Counter ............................................................................... 136

Mode 2, Dual Input Capture ............................................................................... 137

Mode 3, Dual Independent Timer ...................................................................... 138

Mode 4, Input Capture and Timer ...................................................................... 139

4.7.4

Timer Interrupts ......................................................................................................... 140

4.7.5

Timer I/O Functions ................................................................................................... 141

4.7.6

Operation in Development System ............................................................................ 141

4.7.7

MFT16 Registers ....................................................................................................... 142

MFT16 Register Map ......................................................................................... 142

Timer/Counter Register 1 (TnCNT1) ................................................................. 142

Reload/Capture Register A (TnCRA) ................................................................. 142

Reload/Capture Register B (TnCRB) ................................................................. 142

Timer/Counter Register 2 (TnCNT2) ................................................................. 143

Clock Pre-Scaler Register (TnPRSC) ................................................................ 143

Clock Unit Control Register (TnCKC) ................................................................ 143

Timer Mode Control Register (TnCTRL) ............................................................ 144

PC87591L Datasheet(PDF) 10 Page - National Semiconductor (TI)

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