M38861F1AFS データシートの表示（PDF） - Renesas Electronics
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M38861F1AFS Datasheet PDF : 111 Pages
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MITSUBISHI MICROCOMPUTERS
3886 Group
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
(9) Port P42
P4 output structure selection bit
OBF00 output enable bit
Direction
register
Data bus
Port latch
T1
T2
OBF00 output
INT0 interrupt input
(11) Port P44
P4 output structure selection bit
Serial I/O1 enable bit
Receive enable bit
Direction
register
Data bus
Port latch
T1
T2
Serial I/O1 input
(13) Port P46
Serial I/O1
P4 output structure selection bit
synchronous clock selection bit
Serial I/O1 enable bit
Serial I/O1 mode selection bit
Serial I/O1 enable bit
OBF10 output enable bit
Direction
register
Data bus
Port latch
(10) Port P43
P4 output structure selection bit
OBF01 output enable bit
Direction
register
Data bus
Port latch
T1
T2
OBF01 output
INT1 interrupt input
(12) Port P45
P45/TXD P-channel output disable bit
Serial I/O1 enable bit
Transmit enable bit
Direction
register
Data bus
Port latch
T1
T2
Serial I/O1 output
(14) Port P47
Serial I/O1 mode selection bit
Serial I/O1 enable bit
SRDY1 output enable bit
Data bus buffer function
selection bit
Direction
register
Data bus
Port latch
T1
T2
Serial I/O1 clock output
OBF10 output
(15) Port P50
Data bus buffer enable bit
Direction
register
Data bus
Port latch
Serial I/O1 ready output
Serial I/O1 external clock input
(16) Ports P51,P52,P53
Data bus buffer enable bit
Direction
register
Data bus
Port latch
S1 input
T3
Data bus buffer function
selection bit
A0 input
T3
Data bus buffer
enable bit
INT20, INT30, INT40 interrupt input
S0,R,W input
T3
Data bus buffer
enable bit
T1. The input level can be switched between CMOS compatible input level and TTL level by the P4 input level selection bit of the port control
register 2 (address 002F16).
T2. The input level can be switched between CMOS compatible input level and TTL level by the P4 input level selection bit of the port control
register 2 (address 002F16).
The port P8 and port P4 input register can be switched by the P8 function selection bit of the port control register 2 (address 002F16).
T3. The input level can be switched between CMOS compatible input level and TTL level by the input level selection bit of the data bus buffer
control register (address 002A16).
Fig. 11 Port block diagram (2)
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