Section 19 Power-Down Modes
Rev. 3.00 Mar. 14, 2006 Page 674 of 804
REJ09B0104-0300
Bit Bit
Name
Initial
Value R/W Description
12
11
10
9
8
STS4
STS3
STS2
STS1
STS0
0
1
1
1
1
R/W
R/W
R/W
R/W
R/W
Standby Timer Select 4 to 0
These bits select the time the MCU waits for the clock to
settle when software standby mode is cleared by an
external interrupt. With a crystal resonator, refer to table
19.2 and make a selection according to the operating
frequency so that the standby time is at least equal to the
oscillation settling time. With an external clock, a PLL
circuit settling time is necessary. Refer to table 19.2 to set
the standby time.
While oscillation is being settled, the timer is counted on
the P
φ
clock frequency. Careful consideration is required
in multi-clock mode.
00000: Reserved
00001: Reserved
00010: Reserved
00011: Reserved
00100: Reserved
00101: Standby time = 64 states
00110: Standby time = 512 states
00111: Standby time = 1024 states
01000: Standby time = 2048 states
01001: Standby time = 4096 states
01010: Standby time = 16384 states
01011: Standby time = 32768 states
01100: Standby time = 65536 states
01101: Standby time = 131072 states
01110: Standby time = 262144 states
01111: Standby time = 524288 states
10000: Reserved
10001: Reserved
1001X: Reserved
101XX: Reserved
11XXX: Reserved
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