Rainbow Electronics T89C5115 - Manual (Page 20)

20
T89C5115
4128A–8051–04/02
Registers PCON (S:87h)
Table 14. PCON Register
Power Configuration Register
Reset Value = XXXX 0000b
7 6 5 4 3 2 1 0
– – – – GF1 GF0 PD IDL
Bit
Number
Bit
Mnemonic Description
7-4
–
Reserved
The value read from these bits is indeterminate. Do not set these bits.
3 GF1
General-purpose flag 1
One use is to indicate whether an interrupt occurred during normal operation or
during Idle mode.
2 GF0
General-purpose flag 0
One use is to indicate whether an interrupt occurred during normal operation or
during Idle mode.
1 PD
Power-down Mode bit
Cleared by hardware when an interrupt or reset occurs.
Set to activate the Power-down mode.
If IDL and PD are both set, PD takes precedence.
0 IDL
Idle Mode bit
Cleared by hardware when an interrupt or reset occurs.
Set to activate the Idle mode.
If IDL and PD are both set, PD takes precedence.