RH850/U2A 144pin 6. Other Circuitry
R20UT5089ED0101 Rev.1.01 Page 20 of 56
July 08, 2022
6.4 Pull-Up/Pull-Down Pin Header
The Pull-up/Pull-down pin header CN12 provides fixed voltage levels at its pins, that can be
used to pull-up/pull-down a signal on the board or the device, respectively, by connecting a
CN12 pin to the signal via a separate cable.
The CN12 pins have following pull-up or pull-down voltage levels:
• all even numbered pins are connected to L level, i.e. to GND
• odd numbered pins 1, 3, 5, 7, 9 can be connected to
− 5.0 V, if JP25[2-1] is set
− 3.3 V, if JP25[2-3] is set
• odd numbered pins 11, 13, 15, 17, 19 can be connected to
− 5.0 V, if JP15[2-1] is set
− 3.3 V, if JP15[2-3] is set
Refer to
7.4 Pull-Up/Pull-Down Pin Header
CN
for CN12 details.
PULL UP PULL DOWN
PULL_DownPULL_UP
Connector
5V0 3V3
1K0
1K0
1K0
1K0
1K0
1K0
1K0
1K0
1K0
header 20way
1K0
1K0
1K0
1K0
1K0
1K0
1K0
1K0
1K01K0
1K0
3.3V5.0V
JP15
R70
R72
R71
R73
R74
R75
R76
R77
R79
R78
CN12
R60
R61
R62
R63
R64
R65
R66
R67
R69
R68
JP25
3
2
1
2019
1817
1615
1413
1211
109
87
65
43
21
3
2
1
20
18
16
14
12
10
8
6
4
2
19
17
15
13
11
9
7
5
3
1
3
2
1
3
2
1
6.5 Pull-up / pull-down circuit
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