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M38B53M4-059FP Datasheet(PDF) 44 Page - Mitsubishi Electric Semiconductor

Part # M38B53M4-059FP
Description  8-BIT SINGLE-CHIP MICROCOMPUTER
PDF  355 Pages
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Manufacturer  MITSUBISHI [Mitsubishi Electric Semiconductor]
Direct Link  http://www.mitsubishichips.com
Logo MITSUBISHI - Mitsubishi Electric Semiconductor

M38B53M4-059FP Datasheet(HTML) 44 Page - Mitsubishi Electric Semiconductor

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38B5 Group User’s Manual
1-28
HARDWARE
FUNCTIONAL DESCRIPTION
Serial I/O
qSerial I/O1
Serial I/O1 is used as the clock synchronous serial I/O and has an
ordinary mode and an automatic transfer mode. In the automatic
transfer mode, serial transfer is performed through the serial I/O
automatic transfer RAM which has up to 256 bytes (addresses
0F0016 to 0FFF16: addresses 0F6016 to 0FFF16 are also used as
Fig. 21 Block diagram of serial I/O1
FLD automatic display RAM).
The P62/SRDY1/AN8, P64/INT4/SBUSY1/AN10, and P65/SSTB1/AN11
pins each have a handshake I/O signal function and can select
either “H” active or “L” active for active logic.
Main
data bus
Serial I/O1
automatic transfer
controller
Local
data bus
Serial I/O automatic
transfer RAM
(0F0016—0FFF16)
Serial I/O1
control register 3
XCIN
XIN
Internal system
clock selection bit
Serial I/O1
automatic transfer
data pointer
Address decoder
Main address
bus
Local address
bus
“1”
“0”
1/8
1/16
1/32
1/64
1/128
Serial I/O1
interrupt request
P64 latch
Serial I/O1 counter
Synchronous
circuit
Serial I/O1
synchronous clock
selection bit
“1”
P62 latch
P52/SCLK11
“0”
“1”
“0”
Internal synchronous
clock selection bits
1/256
P65 latch
P64/SBUSY1
P65/SSTB1
(P65/SSTB1 pin control bit)
Serial transfer
status flag
“0”
“1”
“0”
“1”
P62/SRDY1
“0”
“1”
P52 latch
P51/SOUT1
P50/SIN1
P51 latch
Serial I/O1 register (8)
“0”
“1” Serial transfer selection bits
1/2
1/4
Serial I/O1 clock
pin selection bit
P53/SCLK12
“1”
“0”
P53 latch
“0”
“1”
“0”
“1”
Serial I/O1 clock
pin selection bits
P62/SRDY1•P64/SBUSY1
pin control bit
P62/SRDY1•P64/SBUSY1
pin control bit



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