PC87365 datasheet(9/215 Pages) NSC

9 / 215 page

Table of Contents (Continued)

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5.4

FAN SPEED MONITOR BITMAP ............................................................................................ 127

6.0

General-Purpose Input/Output (GPIO) Port

6.1

OVERVIEW ............................................................................................................................. 128

6.2

BASIC FUNCTIONALITY ........................................................................................................ 129

6.2.1

Configuration Options ................................................................................................ 129

6.2.2

Operation ................................................................................................................... 129

6.3

EVENT HANDLING AND SYSTEM NOTIFICATION .............................................................. 130

6.3.1

Event Configuration ................................................................................................... 130

6.3.2

System Notification .................................................................................................... 130

6.4

GPIO PORT REGISTERS ....................................................................................................... 131

6.4.1

GPIO Pin Configuration (GPCFG) Register .............................................................. 132

6.4.2

GPIO Pin Event Routing (GPEVR) Register ............................................................. 133

6.4.3

GPIO Port Runtime Register Map ............................................................................. 133

6.4.4

GPIO Data Out Register (GPDO) .............................................................................. 134

6.4.5

GPIO Data In Register (GPDI) .................................................................................. 134

6.4.6

GPIO Event Enable Register (GPEVEN) .................................................................. 135

6.4.7

GPIO Event Status Register (GPEVST) .................................................................... 135

7.0

WATCHDOG Timer (WDT)

7.1

OVERVIEW ............................................................................................................................. 136

7.2

FUNCTIONAL DESCRIPTION ................................................................................................ 136

7.3

WATCHDOG TIMER REGISTERS ......................................................................................... 137

7.3.1

WATCHDOG Timer Register Map ............................................................................. 137

7.3.2

WATCHDOG Timeout Register (WDTO) .................................................................. 137

7.3.3

WATCHDOG Mask Register (WDMSK) .................................................................... 138

7.3.4

WATCHDOG Status Register (WDST) ...................................................................... 139

7.4

COUNTING DOWN IN SECONDS .......................................................................................... 139

7.5

WATCHDOG TIMER REGISTER BITMAP ............................................................................. 139

8.0

ACCESS.bus Interface (ACB)

8.1

OVERVIEW ............................................................................................................................. 140

8.2

FUNCTIONAL DESCRIPTION ................................................................................................ 140

8.2.1

Data Transactions ..................................................................................................... 140

8.2.2

Start and Stop Conditions .......................................................................................... 140

8.2.3

Acknowledge (ACK) Cycle ........................................................................................ 141

8.2.4

Acknowledge after Every Byte Rule .......................................................................... 142

8.2.5

Addressing Transfer Formats .................................................................................... 142

8.2.6

Arbitration on the Bus ................................................................................................ 142

8.2.7

Master Mode .............................................................................................................. 143

8.2.8

Slave Mode ................................................................................................................ 145

8.2.9

Configuration ............................................................................................................. 145

8.3

ACB REGISTERS .................................................................................................................... 146

8.3.1

ACB Register Map ..................................................................................................... 146

8.3.2

ACB Serial Data Register (ACBSDA) ........................................................................ 146

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