859
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 8ms (oscillation stabilization time) or
more, depending on the operating frequency. With an external clock, there are no specific wait
requirements.
Bit 6
Bit 5
Bit 4
STS2
STS1
STS0
Description
0
0
0
Standby time = 8192 states
(Initial value)
1
Standby time = 16384 states
1
0
Standby time = 32768 states
1
Standby time = 65536 states
1
0
0
Standby time = 131072 states
1
Standby time = 262144 states
1
0
Reserved
1
Standby time = 16 states
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
,
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)
Bits 2 to 0—Reserved: These bits are always read as 0 and cannot be modified.
Содержание H8S/2631
Страница 28: ...xviii Appendix G Package Dimensions 1154 ...
Страница 341: ...316 Transfer SAR or DAR DAR or SAR Block area First block Nth block Figure 9 8 Memory Mapping in Block Transfer Mode ...
Страница 918: ...905 ø DREQ0 DREQ1 tDRQS tDRQH Figure 25 19 DMAC DREQ Input Timing ...
Страница 955: ...943 A 2 Instruction Codes Table A 2 shows the instruction codes ...