Datasheet

Section 10 I/O Ports
Page 614 of 1408 R01UH0309EJ0500 Rev. 5.00
Sep 24, 2012
H8S/2456, H8S/2456R, H8S/2454 Group
SSU settings (2) (1) (2) (4) (3) (1)
SSUMS 0 1
MSS 0 1 x
CSS1 x 0 1 x
CSS0 x 0 1 0 1 x
Pin state SCS input ⎯ SCS input Automatic
SCS I/O
SCS output ⎯
[Legend]
x: Don't care
⎯: Not used as the SSU pin (can be used as an I/O port).
Note: See tables 20.4 to 20.6.
• PA3/A19/SCK4-B
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.
Operating
mode
1, 2 4
EXPE ⎯ ⎯
A19E ⎯ 0 1
CKE1 ⎯ 0 1 ⎯
C/A ⎯ 0 1 ⎯ ⎯
CKE0 ⎯ 0 1 ⎯ ⎯ ⎯
PA3DDR ⎯ 0 1 ⎯ ⎯ ⎯ 0 1
Pin function A19
output
PA3
input
PA3
output
SCK4-B
output*
SCK4-B
output*
SCK4-B
input*
PA3
input
A19
output