Renesas H8SX/1520 Series Hardware Manual page 712

Section 19 Power-Down Modes
Bit Bit Name
12 STS4
11 STS3
10 STS2
9 STS1
8 STS0
Rev. 3.00 Mar. 14, 2006 Page 674 of 804
REJ09B0104-0300
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Initial
Value R/W Description
0 R/W Standby Timer Select 4 to 0
1 R/W These bits select the time the MCU waits for the clock to
settle when software standby mode is cleared by an
1 R/W
external interrupt. With a crystal resonator, refer to table
1 R/W
19.2 and make a selection according to the operating
frequency so that the standby time is at least equal to the
1 R/W
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 Pφ 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