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| 型號： | UPD17207GF |
| 廠商： | NEC Corp. |
| 英文描述： | 4-BIT SINGLE-CHIP MICROCONTROLLER WITH LCD CONTROLLER/DRIVER AND A/D CONVERTER FOR INFRARED REMOTE CONTROL TRANSMITTERS |
| 中文描述： | 4位單片機(jī)與LCD控制器/驅(qū)動器和A / D轉(zhuǎn)換器紅外遙控遞質(zhì) |
| 文件頁數(shù)： | 29/120頁 |
| 文件大小： | 516K |
| 代理商： | UPD17207GF |
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μ
PD17201A, 17207
29
5.5
PORT 1A
This port works as a 3-bit general I/O port and as serial interface. The I/O port or serial interface is selected by
SIOEN of the register file.
(1) Using the port 1A as a 3-bit I/O port
The three bits of the port 1A can be assigned all inputs or all outputs. This assignment is performed by P1AGIO
of the register file. Transferring data from and to this port is performed via the P1A (address 70H of BANK1).
(2) Using port 1A as serial interface
Serial interface or the I/O port (P1A
0
, P1A
1
, and P1A
2
) is selected by SION.
5.6
INT PIN
This pin inputs an external interrupt request signal. At the rising edge of the signal input to this pin, the IRQ flag
(RF: address 3DH, bit 1) is set.
The status of the pin can be read by using the INT flag (RF: address 0FH, bit 0). When a high level is input to
the INT pin, the INT flag is set to “1”; when a low level is input, the INT flag is reset to “0” (refer to
Fig. 12-1 INT Flag
).
Table 5-1 Relations between Port Registers and Pins
Bank
Add-
ress
Port
Bit
Output
Format
Read Contents
Written Contents
At Reset
Input mode
Output mode
Input mode
Output mode
b
3
P0A
3
70H
Port 0A
b
2
P0A
2
CMOS
Output latch
b
1
P0A
1
push-pull
b
0
P0A
0
b
3
P0B
3
71H
Port 0B
b
2
P0B
2
N-ch
Pin status
b
1
P0B
1
open-drain
0
b
0
P0B
0
b
3
P0C
3
72H
Port 0C
b
2
P0C
2
N-ch
Pin status
Output latch
b
1
P0C
1
open-drain
b
0
P0C
0
Input mode
b
3
P0D
73H
Port 0D
b
2
P0D
2
CMOS
Output latch
b
1
P0D
1
Note1
push-pull
b
0
P0D
0
Note1
b
3
–
1
70H
Port 1A
b
2
P1A
2
Note2
CMOS
b
1
P1A
1
Note2
push-pull
b
0
P1A
0
Note2
Notes 1.
When the NRZEN and TMOE flags are set to 1, the output latch is accessed both when these port pins
are read and when they are written, regardless of whether the input or output mode is set.
When the SIOEN flag is set to 1, these pins serve as serial interface pins. In this case, the statuses of
the pins are read when the pins are read, regardless of the input or output mode. Data written to these
pins is invalid.
2.
Input mode
(w/pull-up
resistor)
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