Motorola MC68306 User Manual page 7

TABLE OF CONTENTS (Continued)
Paragraph
Number
5.1 MC68306 Address Space ....................................................................................... 5-1
5.2 Register Description ............................................................................................... 5-3
5.2.1 System Register .................................................................................................. 5-3
5.2.2 Timer Vector Register .......................................................................................... 5-4
5.2.3 Bus Timeout Period Register............................................................................... 5-4
5.2.4 Interrupt Registers ............................................................................................... 5-5
5.2.4.1 Interrupt Control Register ................................................................................. 5-5
5.2.4.2 Interrupt Status Register................................................................................... 5-6
5.2.5 I/O Port Registers ................................................................................................ 5-6
5.2.5.1 Port Pins Register ............................................................................................. 5-7
5.2.5.2 Port Direction Register ..................................................................................... 5-7
5.2.5.3 Port Data Register ............................................................................................ 5-8
5.2.6 Chip Selects......................................................................................................... 5-8
5.2.6.1 Chip Select Configuration Registers (High Half) .............................................. 5-9
5.2.6.2 Chip Select Configuration Registers (Low Half) ............................................... 5-10
5.2.7 DRAM Control Registers ..................................................................................... 5-12
5.2.7.1 DRAM Refresh Register ................................................................................... 5-13
5.2.7.2 DRAM Bank Configuration Register (High Half) ............................................... 5-14
5.2.7.3 DRAM Bank Configuration Register (Low Half) ................................................ 5-14
5.2.8 Automatic DTACK Generation............................................................................. 5-16
5.3 Crystal Oscillator .................................................................................................... 5-16
6.1 Module Overview .................................................................................................... 6-2
6.1.1 Serial Communication Channels A and B............................................................ 6-3
6.1.2 Baud Rate Generator Logic ................................................................................. 6-3
6.1.3 Timer/Counter ...................................................................................................... 6-3
6.1.4 Interrupt Control Logic ......................................................................................... 6-3
6.1.5 Comparison of Serial Module to MC68681.......................................................... 6-4
6.2 Serial Module Signal Definitions ............................................................................. 6-4
6.2.3 Channel A Transmitter Serial Data Output (TxDA).............................................. 6-4
6.2.4 Channel A Receiver Serial Data Input (RxDA) .................................................... 6-5
6.2.5 Channel B Transmitter Serial Data Output (TxDB).............................................. 6-5
6.2.6 Channel B Receiver Serial Data Input (RxDB) .................................................... 6-6
6.2.7 Channel A Request-To-Send (RTSA/OP0) ......................................................... 6-6
6.2.7.1 RTSA ................................................................................................................ 6-6
6.2.7.2 OP0 .................................................................................................................. 6-6
6.2.8 Channel B Request-To-Send (RTSB/OP1) ......................................................... 6-6
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Title
Section 5
System Operation
Section 6
Serial Module
MC68306 USER'S MANUAL
Page
Number
MOTOROLA