参数资料
型号: M37640E8FP
元件分类: 微控制器/微处理器
英文描述: 8-BIT, OTPROM, 24 MHz, MICROCONTROLLER, PQFP80
封装: 14 X 20 MM, 0.80 MM PITCH, PLASTIC, QFP-80
文件页数: 15/96页
文件大小: 1477K
代理商: M37640E8FP
22
Ver 1.4
MITSUBISHI MICROCOMPUTERS
7640 Group
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
1.14.1.6 Port P7
Port P7 is a 5-bit general purpose I/O port that can be
configured to access special second functions.
Port P70
This pin is multiplexed with the USB start of frame
pulse (SOF) output. When USBC6 is a “1”, this pin
outputs the USB SOF.
Port P71
This pin is multiplexed with the HOLD function. When
the MCU is in memory expansion or microprocessor
mode and CPMB5 is set to “1”.
Port P72
This pin is multiplexed with the S1 input control signal
from a Master CPU. When DBBC17 is “1”, the pin
takes on the function of the S1 input control signal.
Port P73
This pin is multiplexed with the IBF1 output control
signal for a Master CPU and the HLDA function.
When DBBC11 and DBBC17 are “1”, the pin takes on
the function of the IBF1 output control signal. When
the MCU is in memory expansion or microprocessor
mode, CPMB5 is set to “1”, and the IBF1 function is
not enabled.
Port P74
This pin is multiplexed with the OBF1 control pin for
the bus interface control block. P74 acts as OBF1 out-
put to a Master CPU when DBBC10 and DBBC17 are
“1”.
Fig. 1.19. Port P7 Block Diagram
Direction Register
Data Bus
Port Latch
USBC6
SOF
Data Bus
Port Latch
Direction Register
CPMB5
HOLD
Data Bus
Port Latch
Direction Register
DBBC17
S1
Direction Register
Data Bus
Port Latch
IBF1
HLDA
DBBC17
DBBC11
CPMB5
Direction Register
Data Bus
Port Latch
DBBC10
OBF1
DBBC17
Port P70
Port P71
Port P72
Port P73
Port P74
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