HD6432633 Datasheet, PDF (1044/1453 Pages) Renesas Technology Corp – Series of Microcomputers (MCUs: microcomputer units)

Bits 6 to 4—Standby Timer Select 2 to 0 (STS2 to STS0): These bits select the MCU wait time
for clock stabilization when shifting to high-speed mode or medium-speed mode by using a
specific interrupt or command to cancel software standby mode, watch mode*, or sub-active
mode*. With a crystal oscillator (table 24-5), select a wait time of 8 ms (oscillation stabilization
time) or more, depending on the operating frequency. With an external clock, select a wait time of
2 ms (PLL oscillator stabilization time) or more, depending on the operating frequency.
Note: * This function is not available in the H8S/2695.
Bit 6
STS2
0
1
Bit 5
STS1
0
1
0
1
Bit 4
STS0
0
1
0
1
0
1
0
1
Description
Standby time = 8192 states
Standby time = 16384 states
Standby time = 32768 states
Standby time = 65536 states
Standby time = 131072 states
Standby time = 262144 states
Reserved
Standby time = 16 states (Setting prohibited)
(Initial value)
Bit 3—Output Port Enable (OPE): This bit specifies whether the output of the address bus and
bus control signals (CS0 to CS7, AS, RD, HWR, LWR, CAS, and OE) is retained or set to high-
impedance state in the software standby mode, watch mode, and when making a direct transition.
Bit 3
OPE
Description
0
In software standby mode, watch mode*, and when making a direct transition*,
address bus and bus control signals are high-impedance.
1
In software standby mode, watch mode*, and when making a direct transition*, the
output state of the address bus and bus control signals is retained.
(Initial value)
Note: * This function is not available in the H8S/2695.
Bits 2 to 0—Reserved: These bits are always read as 0 and cannot be modified.
990