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7721 датащи(PDF) 127 Page - Renesas Technology Corp

номер детали 7721
подробное описание детали  16-BIT SINGLE-CHIP MICROCOMPUTER
PDF  577 Pages
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производитель  RENESAS [Renesas Technology Corp]
домашняя страница  http://www.renesas.com
Logo RENESAS - Renesas Technology Corp

7721 датащи(HTML) 127 Page - Renesas Technology Corp

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TIMER A
7721 Group User’s Manual
8–8
8.2 Block description
8.2.5 Port P5 direction register
The I/O pins of Timers A2 to A4 are multiplexed with port P5. When using these pins as Timer Aj’s input
pins, set the corresponding bits of the port P5 direction register to “0” to set these port pins for the input
mode. When used as Timer Aj’s output pins, these pins are forcibly set to the output pins of Timer Aj
regardless of the direction registers’s contents. Figure 8.2.5 shows the relationship between the port P5
direction register and the Timer Aj’s I/O pins.
Bit
Bit name
Functions
0
1
2
3
4
5
6
7
TA2OUT pin
TA3OUT pin
TA3IN pin
0 : Input mode
1 : Output mode
When using these pins as Timer Aj’
s input pins, set the corresponding
bits to “0.”
Port P5 direction register (Address D16)
b1
b0
b2
b3
b4
b5
b6
b7
TA2IN pin
At reset
RW
0
0
0
0
0
0
0
0
RW
RW
RW
RW
RW
RW
RW
RW
: Bits 6 and 7 are not used for Timer A.
TA4OUT pin
TB0IN pin
TB1IN pin
TA4IN pin
Fig. 8.2.5 Relationship between port P5 direction register and Timer Aj’s I/O pins



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