r4f2426 Renesas Electronics Corporation., r4f2426 Datasheet - Page 1147

• Manufacturer Part Number: r4f2426
• Description: 16-bit Single-chip Microcomputer H8s Family / H8s/2400 Series
• Manufacturer: Renesas Electronics Corporation.

24.4
Output of the SDRAMφ clock can be controlled by the SDPSTP bit in SCKCR. When the
SDPSTP bit is set to 1, the SDRAMφ clock stops at the end of the bus cycle and the pin can be
used as a general port. SDRAMφ clock output is enabled when the SDPSTP bit is cleared to 0
regardless of the DDR value. Table 24.5 shows the state of the SDRAMφ pin in each processing
state.
Note: The SDRAM interface is not supported by the H8S/2426 group and H8S/2424 group.
Table 24.5 SDRAMφ Pin State in Each Processing State
Note: SDRAM is not available in the H8S/2426 and H8S/2424 Groups.
SDPSTP
0
1
1
Register Setting
In these products, this pin functions as a general pin regardless of the SDPSTP bit setting.
SDRAMφ Clock Output Control
DDR
×
0
1
Normal
Operating State Sleep Mode
SDRAMφ output
High impedance
PH1/CS5/RAS5
output
SDRAMφ output
High impedance High impedance
H1/CS5/RAS5
output
Software
Standby Mode
Fixed low
H1/CS5/RAS5
output
Rev. 1.00 Sep. 19, 2008 Page 1119 of 1270
Hardware
Standby Mode
High impedance
High impedance
High impedance
Section 24 Power-Down Modes
REJ09B0466-0100
All Module
Clocks Stop
Mode
SDRAMφ
output
High
impedance
H1/CS5/RAS5
output