mc68331cpv20b1 Freescale Semiconductor, Inc, mc68331cpv20b1 Datasheet - Page 32

• Manufacturer Part Number: mc68331cpv20b1
• Description: Mc68331 32 Bit Microcontroller
• Manufacturer: Freescale Semiconductor, Inc

3
3-8
Address Bus
Address Strobe
Autovector
Bus Error
Bus Grant
Bus Grant Acknowledge
Breakpoint
Bus Request
System Clockout
Chip Selects
Boot Chip Select
Data Bus
Signal Name
PWMA, PWMB
MODCLK
FREEZE
PCS[3:0]
PGP[7:0]
PQS[7:0]
IRQ[7:1]
IFETCH
OC[5:1]
SIZ[1:0]
FC[2:0]
PC[6:0]
PE[7:0]
RESET
PF[7:0]
Signal
IC[4:1]
QUOT
Name
PCLK
HALT
IPIPE
MISO
MOSI
XTAL
RMC
RXD
SCK
R/W
TSC
TXD
XFC
PAI
SS
Table 3-4 Signal Characteristics (Continued)
Freescale Semiconductor, Inc.
For More Information On This Product,
ADDR[23:0]
DATA[15:0]
Mnemonic
CSBOOT
CLKOUT
CS[10:0]
BGACK
BERR
AVEC
BKPT
Table 3-5 Signal Function
BG
BR
AS
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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
OVERVIEW
Module
CPU32
CPU32
MCU
QSM
QSM
QSM
QSM
QSM
QSM
QSM
QSM
GPT
GPT
GPT
GPT
GPT
GPT
SIM
SIM
SIM
SIM
SIM
SIM
SIM
SIM
SIM
SIM
SIM
SIM
SIM
SIM
SIM
SIM
Input/Output
Input/Output
Input/Output
Input/Output
Input/Output
Input/Output
Input/Output
Input/Output
Input/Output
Input/Output
Signal
Output
Output
Output
Output
Output
Output
Output
Output
Output
Output
Output
Output
Output
Type
Input
Input
Input
Input
Input
Input
Input
Input
Input
Function
Active
State
(Port)
(Port)
(Port)
(Port)
(Port)
1/0
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USER’S MANUAL
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1
0
0
0
0
0
MC68331