r4f2456 Renesas Electronics Corporation., r4f2456 Datasheet - Page 665

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

• PF1/CS5/UCAS/SSCK0-C (H8S/2454 Group)
• Modes 2, 4, and 7 (EXPE = 1)
• Mode 7 (EXPE = 0)
Notes: 1. SSCK0-C input when SSCK0S1 and SSCK0S0 = B'10 in PFCR5, and SSUMS, MSS,
Legend:
: Pin is not used by the SSU (can be used as I/O port)
Areas 2 to 5
CS5E
SSU settings
PF1DDR
Pin function
Areas 2 to 5
CS5E
SSU settings
PF1DDR
Pin function
SSUMS
MSS
SCKS
Pin state
The pin function is switched as shown below according to the combination of the operating
mode, bit EXPE, bits MSS and SCKS in SSCRH and bit SSUMS in SSCRL of SSU, bits
RMTS2 to RMTS0 in DRAMCR of the bus controller, bit CS5E in PFCR0, bits SSCK0S1 and
SSCK0S0 in PFCR5, and bit PF1DDR.
2. SSCK0-C output when SSCK0S1 and SSCK0S0 = B'10 in PFCR5, and SSUMS, MSS,
and SCKS = B'001 or B'101.
and SCKS = B'×11.
DRAM space
UCAS output

0
PF1 input
Can be used as I/O port



0
0
Input
1
0
Can be used as
input
PF1

0
0
PF1 output
I/O port
1
1
output
SSCK pin settings
PF1
Output
1
Areas 2 to 5 are all normal space
1


SSCK0-C
0
input*
SSCK0-C input*
Rev. 1.00 Sep. 19, 2008 Page 635 of 1342
Input
state
0

0
Input state
1
0
0
SSCK0-C
output*
Input
Output
state
1

1
1
2
Section 10 I/O Ports
SSCK0-C output*
REJ09B0467-0100
Output state

input
0
PF1
0

1

1
Output
output
CS5
1
1
2