4507_M Datasheet, PDF (160/216 Pages) Renesas Technology Corp – 4-BIT CISC SINGLE-CHIP MICROCOMPUTER 4500 SERIES

4507 Group
APPLICATION
2.6 RAM back-up
(5) 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 2.6.8 shows the pull-up control register PU1.
Table 2.6.8 Pull-up control register PU1
Pull-up control register PU1
Port P13/INT
PU13
pull-up transistor control bit
Port P12/CNTR
PU12
pull-up transistor control bit
Port P11
PU11
pull-up transistor control bit
Port P10
PU10
pull-up transistor control bit
Note: “W” represents write enabled.
at reset : 00002 at RAM back-up : state retained W
0 Pull-up transistor OFF
1 Pull-up transistor ON
0 Pull-up transistor OFF
1 Pull-up transistor ON
0 Pull-up transistor OFF
1 Pull-up transistor ON
0 Pull-up transistor OFF
1 Pull-up transistor ON
(6) Pull-up control register PU2
Register PU2 controls the ON/OFF of the ports P20, P21, D2/C and D3/K pull-up transistor.
Set the contents of this register through register A with the TPU2A instruction.
Table 2.6.9 shows the pull-up control register PU2.
Table 2.6.9 Pull-up control register PU2
Pull-up control register PU2
Port D3/K
PU23
pull-up transistor control bit
Port D2/C
PU22
pull-up transistor control bit
Port P21/AIN1
PU21
pull-up transistor control bit
Port P20/AIN0
PU20
pull-up transistor control bit
Note: “W” represents write enabled.
at reset : 00002 at RAM back-up : state retained W
0 Pull-up transistor OFF
1 Pull-up transistor ON
0 Pull-up transistor OFF
1 Pull-up transistor ON
0 Pull-up transistor OFF
1 Pull-up transistor ON
0 Pull-up transistor OFF
1 Pull-up transistor ON
Rev.2.01 Feb 04, 2005
REJ09B0195-0201
2-45