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7733 Datasheet(PDF) 432 Page - Renesas Technology Corp

Part # 7733
Description  16-BIT SINGLE-CHIP MICROCOMPUTER
PDF  940 Pages
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Manufacturer  RENESAS [Renesas Technology Corp]
Direct Link  http://www.renesas.com
Logo RENESAS - Renesas Technology Corp

7733 Datasheet(HTML) 432 Page - Renesas Technology Corp

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APPLICATIONS
7733 Group User’s Manual
17–25
17.1.5 I/O expansion example
(1) Port expansion example where the M66010FP is used
Fig. 17.1.19 shows a port expansion example where the M66010FP is used. The frequency of a
transmit clock for serial I/O must be 1.923 MHz or less.
Serial I/O control in this expansion example is described below.
In this expansion example, 8-bit data transmission/reception is performed three times by using
UART0, and so ports expand by 24 bits. UART0 is set as follows:
q Clock synchronous serial I/O mode is selected. Transmission/Reception is enabled.
q An internal clock is selected. Transfer rate = 1.5625 MHz
q LSB first is selected.
The control procedure is as follows:
Œ “L” level is output from port P45.
(By this signal, the expanded I/O ports of the M66010FP enter a floating state.)
 “H” level is output from port P45.
Ž “L” level is output from port P44.
 24-bit data is transmitted/received using UART0.
 “H” level is output from port P44.
Fig. 17.1.20 shows the timing of serial transfer between the M37733MHBXXXFP and M66010FP.
17.1 Memory expansion



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