Datasheet

Section 10 I/O Ports
R01UH0310EJ0500 Rev. 5.00 Page 679 of 1384
Sep 25, 2012
H8S/2426, H8S/2426R, H8S/2424 Group
• PG4/BREQO-A/CS4*
The pin function is switched as shown below according to the combination of the operating
mode, bit EXPE, bits BRLE and BREQOE, in BCR of the bus controller, bit BREQOS in
PFCR4, bit SC4E in PFCR0, and bit PG4DDR.
• Modes 1, 2, and 4 Modes 3 and 7 (EXPE = 1)
BRLE 0 1
BREQOE
BREQOS
⎯ BREQOE = 0, or BREQOE =
1 and BREQOS = 1
BREQO = 1 and
BREQOS = 0
CS4E 0 1 0 1 ⎯
PG4DDR 0 1 ⎯ 0 1 ⎯ ⎯
Pin function PG4
input
PG4
output
CS4
output*
PG4
input
PG4
output
CS4
output*
BREQO-A output
• Modes 3 and 7 (EXPE = 0)
BRLE ⎯
BREQOE
BREQOS
⎯
CS4E 0 1
PG4DDR 0 1 ⎯
Pin function PG4 input PG4 output CS4 output*
Note: * Not supported in the H8S/2426 Group and H8S/2426R Group.