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Chapter 2
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2.2.4 Configuration of electrical characteristics
The registers for the configuration of electrical characteristics are briefly
described in the following. For details refer to the Electrical Target
Specification.
(1)
PDSCn - Port drive strength control register
The 8-bit PDSCn register selects the output current limiting function for high- or
low-drive strength.
Access
This register can be read/written, in 8-bit and 1-bit units.
Address
see "Port Group Configuration" on page 56
Initial Value
00
. This register is cleared by any reset.
H
7
6
PDSCn7 PDSCn6 PDSCn5 PDSCn4 PDSCn3 PDSCn2 PDSCn1 PDSCn0
R/W
R/W
Table 2-12
PDSCn register contents
Bit position
7 to 0
For the detailed specification of "Limit 1" and "Limit 2" refer to the Electrical
Target Specification.
(2)
PICCn - Port input characteristic control register
The 8-bit PICCn register selects between Schmitt Trigger or non-Schmitt
Trigger input characteristics.
Access
This register can be read/written in 8-bit and 1-bit units.
Address
see "Port Group Configuration" on page 56
Initial Value
FF
. This register is cleared by any reset.
H
7
6
PICCn7 PICCn6 PICCn5 PICCn4 PICCn3 PICCn2 PICCn1 PICCn0
R/W
R/W
Table 2-13
PICCn register contents
Bit position
7 to 0
Preliminary User's Manual U17566EE1V2UM00
5
4
3
R/W
R/W
R/W
Bit name
Specifies output current limiting function:
PDSCn[7:0]
0: Limit 1.
1: Limit 2.
5
4
3
R/W
R/W
R/W
Bit name
Specifies Trigger input characteristics:
PICCn[7:0]
0: non-Schmitt Trigger
1: Schmitt Trigger
Pin Functions
2
1
0
R/W
R/W
R/W
Function
2
1
0
R/W
R/W
R/W
Function
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