r4f2456 Renesas Electronics Corporation., r4f2456 Datasheet - Page 619

• Manufacturer Part Number: r4f2456
• Description: 16-bit Single-chip Microcomputer H8s Family / H8s/2400 Series
• Manufacturer: Renesas Electronics Corporation.

SSUMS
MSS
CSS1
CSS0
Pin state
Legend:
×: Don’t care
: Pin is not used by the SSU (can be used as I/O port)
• PA3/A19/SCK4-B
Operating
mode
EXPE
A19E
CKE1
C/A
CKE0
PA3DDR
Pin function
The pin function is switched as shown below according to the combination of the operating
mode, bit EXPE, bit C/A in SMR_4 and bits CKE0 and CKE1 in SCR_4 of SCI, bit A19E in
PFCR1, bit SCK4S in PFCR4, and bit PA3DDR.
output
A19
1, 2






Input
0
×
×
input
PA3
0
0

0
output
PA3
0
1
0
0
SCK4-B
Input
output*
SCS pin settings
1
0

0
1
1
Automatic I/O
SCK4-B
output*
Rev. 1.00 Sep. 19, 2008 Page 589 of 1342



4
1
0
SCK4-B
input*
1



1
Output
1
Section 10 I/O Ports
input
PA3
REJ09B0467-0100
0



1
output

1
×
×
×
A19
1