Fujitsu F2MC-8FX Hardware Manual page 75

Table 6.6-1 Functions of Bits in Standby Control Register (STBC)
Bit Name
STP:
bit7
Stop bit
SLP:
bit6
Sleep bit
SPL:
bit5
Pin state setting bit
SRST:
bit4
Software reset bit
TMD:
bit3
Watch bit
bit2
to Unused bits
bit0
Sets transition to stop mode.
When set to "0": the bit is meaningless.
When set to "1": the bit causes transition to stop mode.
• When read, the bit always returns "0".
Note: An attempt to write "1" to this bit is ignored if an interrupt request has been issued. For
details, see 6.8.1 Notes on Using Standby Mode.
Sets transition to sleep mode.
When set to "0": the bit is meaningless.
When set to "1": the bit causes transition to sleep mode.
• When read, the bit always returns "0".
Note: An attempt to write "1" to this bit is ignored if an interrupt request has been issued. For
details, see 6.8.1 Notes on Using Standby Mode".
Sets the states of external pins in stop mode, timebase timer mode, and watch mode.
When set to "0": the bit holds the states (levels) of external pins in stop mode, timebase timer
mode, and watch mode.
When set to "1": the bit places external pins in a high impedance state in stop mode, timebase
timer mode, and watch mode. (Those pins are pulled up for which pull-up
resistor connection has been selected in the pull-up setting register.)
Sets a software reset.
When set to "0": the bit is meaningless.
When set to "1": the bit generates a 3 machine clock reset signal.
• When read, the bit always returns "0".
On two-system clock product, this bit sets transition to timebase timer mode or watch mode.
On single system clock product, the bit sets transition to timebase timer mode.
• Writing "1" to the bit in main clock mode or main PLL clock mode causes transition to timebase
timer mode.
• Writing "1" to the bit in subclock mode causes transition to watch mode.
• Writing "0" to the bit is meaningless.
• When read, the bit always returns "0".
Note: An attempt to write "1" to this bit is ignored if an interrupt request has been issued. For
details, see 6.8.1 Notes on Using Standby Mode".
When read, these bits always return "0". These are unused bits.
The bits are read-only; any value attempted to be written is meaningless.
CHAPTER 6 CLOCK CONTROLLER
Function
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