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7733 bảng dữ liệu(PDF) 696 Page - Renesas Technology Corp

tên linh kiện 7733
Giải thích chi tiết về linh kiện  16-BIT SINGLE-CHIP MICROCOMPUTER
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nhà sản xuất  RENESAS [Renesas Technology Corp]
Trang chủ  http://www.renesas.com
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CONNECTING EXTERNAL DEVICES
7735 Group User’s Manual
12–20
M37735MHBXXXFP
RDY
RSMP
CSn
n : 0 to 4
Chip select signal
_____
Fig. 12.3.1 Connection example when signal RSMP is used
12.3.1 Operation in ready state
____
When “L” level is input to pin RDY, this signal is accepted at the falling edge of clock
φ1 and the microcomputer
____
enters the ready state. The ready state can be terminated by setting pin RDY’s level to “H” again. When
____
“H” level is input to pin RDY, this signal is also accepted at the falling edge of clock
φ1 and the ready state
is terminated. Figure 12.3.2 shows timings when the ready state is accepted and terminated.
When generating a wait which is equivalent to 1 cycle of clock
φ1 by using the ready function, use signals
_____
____
RSMP
and CSn (n = 0 to 4). These signals facilitate to generate a signal input to pin RDY. Figure 12.3.1
_____
_____
shows a connection example when signal RSMP is used. Note that signal RSMP is affected by the software
_____
wait. Figure 12.3.3 shows the relationship between the software wait and signal RSMP.
Refer to section “17.1 Memory expansion” for the way to use the ready function.
12.3 Ready function



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