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4502 Datasheet(PDF) 124 Page - Renesas Technology Corp

Part # 4502
Description  4-BIT CISC SINGLE-CHIP MICROCOMPUTER 4500 SERIES
PDF  214 Pages
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Manufacturer  RENESAS [Renesas Technology Corp]
Direct Link  http://www.renesas.com
Logo RENESAS - Renesas Technology Corp

4502 Datasheet(HTML) 124 Page - Renesas Technology Corp

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2.1 I/O pins
2-7
4502 Group
APPLICATION
Rev.2.01
Feb 02, 2005
REJ09B0193-0201
Pull-up control register PU1
at reset : 00002
at RAM back-up : state retained
W
Pull-up transistor OFF
Pull-up transistor ON
Pull-up transistor OFF
Pull-up transistor ON
Pull-up transistor OFF
Pull-up transistor ON
Pull-up transistor OFF
Pull-up transistor ON
Port P13/INT
pull-up transistor control bit
Port P12/CNTR
pull-up transistor control bit
Port P11
pull-up transistor control bit
Port P10
pull-up transistor control bit
0
1
0
1
0
1
0
1
PU13
PU12
PU11
PU10
Note: “W” represents write enabled.
(3)
Key-on wakeup control register K1
Register K1 controls the ON/OFF of the key-on wakeup function of ports P10–P13.
Set the contents of this register through register A with the TK1A instruction.
The contents of register K1 is transferred to register A with the TAK1 instruction.
Table 2.1.3 shows the key-on wakeup control register K1.
Table 2.1.3 Key-on wakeup control register K1
Key-on wakeup control register K1
at reset : 00002
at RAM back-up : state retained
R/W
P13 key-on wakeup invalid/INT pin key-on wakeup valid
P13 key-on wakeup valid/INT pin key-on wakeup invalid
Key-on wakeup invalid
Key-on wakeup valid
Key-on wakeup invalid
Key-on wakeup valid
Key-on wakeup invalid
Key-on wakeup valid
Port P13/INT
key-on wakeup control bit
Port P12/CNTR
key-on wakeup control bit
Port P11
key-on wakeup control bit
Port P10
key-on wakeup control bit
0
1
0
1
0
1
0
1
K13
K12
K11
K10
Note: “R” represents read enabled, and “W” represents write enabled.
(4)
Pull-up control register PU1
Register PU1 controls the ON/OFF of the ports P10–P13 pull-up transistor.
Set the contents of this register through register A with the TPU1A instruction.
Table 2.1.4 shows the pull-up control register PU1.
Table 2.1.4 Pull-up control register PU1



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