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7477 Datasheet(PDF) 106 Page - Renesas Technology Corp

Part # 7477
Description  8-BIT SINGLE-CHIP MICROCOMPUTER 740 FAMILY / 7470 SERIES
PDF  354 Pages
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Manufacturer  RENESAS [Renesas Technology Corp]
Direct Link  http://www.renesas.com
Logo RENESAS - Renesas Technology Corp

7477 Datasheet(HTML) 106 Page - Renesas Technology Corp

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HARDWARE
1-89
7470/7471/7477/7478 GROUP USER’S MANUAL
1.13 Serial I/O
Serial I/O transmit/
receive method
Clock synchronous
Clock asynchronous
1.13 Serial I/O
The 7470/7471/7477/7478 group can transmit or receive 8-bit data in series by Serial I/O.
The Serial I/O transmit/receive method is shown below.
q In the 7470/7471 group, only the clock synchronous is available.
q In the 7477/7478 group, either clock synchronous or clock asynchronous (UART) can be selected.
There are differences in circuit configuration and applicable registers between them.
This section explains each of them as “1.13A 7470/7471 group part” and “1.13B 7477/7478 group part.”
Table 1.13.1 shows defferences between 7470/7471 group and 7477/7478 group.
Table 1.13.1 7470/7471 group vs. 7477/7478 group serial I/O
V1
__________
SRDY
and SARDY signal : Signal that indicates a Serial I/O transfer ready state
V2 Byte specification mode : Mode for transmitting or receiving 1-byte data of a specific cycle out of
multiple-byte data to be transmitted or received.
__________
SRDY
signal output
V1
SARDY
signal output
V1
Byte specification mode
V2
,
!
,
,
,
7470/7471 group
7477/7478 group
,
,
,
!
!



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