MC68332
MC68332TS/D
MOTOROLA
13
2.5 Signal Function
TSC
TXD
XFC
XTAL
SIM
QSM
SIM
SIM
Input
Output
Input
Output
—
—
—
—
Table 6 MCU Signal Function
Signal Name
Mnemonic
ADDR[23:0]
AS
AVEC
BERR
BG
BGACK
BKPT
BR
CLKOUT
CS[10:0]
CSBOOT
DATA[15:0]
DS
Function
Address Bus
Address Strobe
Autovector
Bus Error
Bus Grant
Bus Grant Acknowledge
Breakpoint
Bus Request
System Clockout
Chip Selects
Boot Chip Select
Data Bus
Data Strobe
24-bit address bus
Indicates that a valid address is on the address bus
Requests an automatic vector during interrupt acknowledge
Indicates that a bus error has occurred
Indicates that the MCU has relinquished the bus
Indicates that an external device has assumed bus mastership
Signals a hardware breakpoint to the CPU
Indicates that an external device requires bus mastership
System clock output
Select external devices at programmed addresses
Chip select for external boot start-up ROM
16-bit data bus
During a read cycle, indicates when it is possible for an external
device to place data on the data bus. During a write cycle, indi-
cates that valid data is on the data bus.
Provide asynchronous data transfers and dynamic bus sizing
Serial I/O and clock for background debugging mode
Data and Size Acknowledge
Development Serial In, Out,
Clock
Crystal Oscillator
DSACK[1:0]
DSI, DSO,
DSCLK
EXTAL, XTAL
Connections for clock synthesizer circuit reference;
Identify processor state and current address space
Indicates that the CPU has entered background mode
Suspend external bus activity
Indicate instruction pipeline activity
Function Codes
Freeze
Halt
Instruction Pipeline
FC[2:0]
FREEZE
HALT
IFETCH
IPIPE
IRQ[7:1]
MISO
Interrupt Request Level
Master In Slave Out
Provides an interrupt priority level to the CPU
Serial input to QSPI in master mode;
serial output from QSPI in slave mode
Selects the source and type of system clock
Serial output from QSPI in master mode;
serial input to QSPI in slave mode
SIM digital output port signals
QSPI peripheral chip selects
SIM digital I/O port signals
SIM digital I/O port signals
QSM digital I/O port signals
Clock Mode Select
Master Out Slave In
MODCLK
MOSI
Port C
Peripheral Chip Select
Port E
Port F
Port QS
PC[6:0]
PCS[3:0]
PE[7:0]
PF[7:0]
PQS[7:0]
Table 5 MCU Signal Characteristics (Continued)
Signal Name
MCU Module
Signal Type
Active State