System Integration Module
MOTOROLA
MC68307 USER’S MANUAL
5-21
A software RESET instruction resets only the UART, timer, and M-bus registers. None of
the system configuration registers are reset except by a cold reset.
MBASE+$04A
Option Register 2 (OR2)
MBASE+$04C
Base Register 3 (BR3)
MBASE+$04E
Option Register 3 (OR3)
Address
SIM Module–UART Module Registers
MBASE+$101
Do Not Access Byte $100
UART Mode Register (UMR1, UMR2)
MBASE+$103
Do Not Access Byte $102
UART Status/Clock Select Reg(USR, UCSR)
MBASE+$105
Do Not Access Byte $104
UART Command Register (UCR)
MBASE+$107
Do Not Access Byte $106
(Read) UART Receive Buffer (UTB, URB)
MBASE+$107
Do Not Access Byte $106
(Write) UART Transmit Buffer (UTB, URB)
MBASE+$109
Do Not Access Byte $108
(Read) UART Input Port Change Register (UIPCR)
MBASE+$109
Do Not Access Byte $108
(Write) UART Control Reg (UACR)
MBASE+$10B
Do Not Access Byte $10A
(Read) UART Interrupt Status Reg (UISR)
MBASE+$10B
Do Not Access Byte $10A
(Write) UART Interrupt Mask Reg (UIMR)
MBASE+$10D
Do Not Access Byte $10C
Baud Rate Gen Prescaler msb (UBG1)
MBASE+$10F
Do Not Access Byte $10E
Baud Rate Gen Prescaler lsb (UBG2)
MBASE+$119
Do Not Access Byte $118
UART Interrupt Vector Register (UIVR)
MBASE+$11B
Do Not Access Byte $11A
UART Register Input Port (UIP)
MBASE+$11D
Do Not Access Byte $11C
UART Output Port Bit Set Cmd (UOP1)
MBASE+$11F
Do Not Access Byte $11E
UART Output Port Bit Reset Cmd (UOP0)
Address
SIM Module–Timer Module Registers
MBASE+$120
Timer Mode Register 1 (TMR1)
MBASE+$122
Timer Reference Register 1 (TRR1)
MBASE+$124
Timer Capture Register 1 (TCR1)
MBASE+$126
Timer Counter 1 (TCN1)
MBASE+$129
Do Not Access Byte $128
Timer Event Register 1 (TER1)
MBASE+$12A
Watchdog Reference Register (WRR)
MBASE+$12C
Watchdog Counter Register (WCR)
MBASE+$130
Timer Mode Register 2 (TMR2)
MBASE+$132
Timer Reference Register 2 (TRR1)
MBASE+$134
Timer Capture Register 2 (TCR2)
MBASE+$136
Timer Counter 2 (TCN2)
MBASE+$139
Do Not Access Byte $138
Timer Event Register 2 (TER2)
Address
SIM Module–M-Bus Module Registers
MBASE+$141
Do Not Access Byte $140
M-Bus Address register (MADR)
MBASE+$143
Do Not Access Byte $142
M-Bus Frequency Divider Register (MFDR)
MBASE+$145
Do Not Access Byte $144
M-Bus Control Register (MBCR)
MBASE+$147
Do Not Access Byte $146
M-Bus Status Register (MBSR)
MBASE+$149
Do Not Access Byte $148
M-Bus Data I/O Register (MBDR)
Address
SIM Module–Chip Select Registers