Standby Mode Control Register (Smcr) - Fujitsu MB96300 series Hardware Manual

CHAPTER 9 STANDBY MODE AND VOLTAGE REGULATOR CONTROL CIRCUIT
9.2

Standby Mode Control Register (SMCR)

This register switches to standby mode, controls the pin functions in Timer and Stop
mode and sets the voltage regulator to Low Power mode.
■ Standby mode control register (SMCR)
Figure 9.2-1 "Configuration of the standby mode control register (SMCR)" shows the configuration of the
standby mode control register (SMCR).
Figure 9.2-1 Configuration of the standby mode control register (SMCR)
7
Address:
000400
H
R/W : Readable and writable
X : undefined value
- : undefined
: Initial value
234
6 5 4 3 2 1
SPL SMS1 SMS0
- - LPMBSS LPMSS LPMS
- - R/W R/W R/W R/W R/W R/W
0
Initial value
X X 0 0 0 0 0 0
B
bit1 bit0
SMS1 SMS0 Standby Mode Select bits
0 0 Run mode
0 1 Requests a transition to Sleep mode
1 0 Requests a transition to Timer mode
1 1 Requests a transition to Stop mode
bit2
SPL Pin state setting bit for Timer and Stop mode
0 Previous pin state retained
1 High impedance
bit3
LPMS Low Power Mode Set
0 Voltage regulator controlled automatically
1 Regulator set to Low Power Mode
bit4
LPMSS Low Power Mode Set in Standby mode
0 Voltage regulator controlled automatically
1 Regulator set to Low Power Mode in Standby mode
bit5
Low Power Mode B Set in Standby mode
LPMBSS
0 Voltage regulator controlled automatically
1 Regulator set to Low Power Mode B in Standby mode
bit6 - bit7
-
0 Always write "0" to these bits
MB96300 Super Series
Reserved