Rev. 2.0, 11/00, page 73 of 1037
Bit 6
Bit 5
Bit 4
STS2
STS1
STS0
Description
0
0
0
Standby time = 8192 states
0
0
1
Standby time = 16384 states
0
1
0
Standby time = 32768 states
0
1
1
Standby time = 65536 states
1
0
0
Standby time = 131072 states
1
0
1
Standby time = 262144 states
1
1
*
Standby time = 16 states
*
1
Notes:
*
Don't care
1. With FLASH ROM version, do not set the standby time to 16 states.
The standby time is 32 states when transited to medium-speed mode
φ
/32 (SCK1=1,
SCK0=0).
Bit 3, 2: Reserved.
These bits cannot be modified and are always read as 0.
Bits 1, 0: System Clock Select 1, 0 (SCK1, SCK0)
These bits select the CPU clock for the bus master in high-speed mode and medium-speed mode.
Bit 1
Bit 0
SCK1
SCK0
Description
0
0
Bus master is in high-speed mode (Initial value)
0
1
Medium-speed clock is
φ
/16
1
0
Medium-speed clock is
φ
/32
1
1
Medium-speed clock is
φ
/64
Summary of Contents for Hitachi H8S/2191
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