TS80C32X2-EDA Atmel Corporation, TS80C32X2-EDA Datasheet - Page 29
TS80C32X2-EDA
Manufacturer Part Number
TS80C32X2-EDA
Description
8-bit Microcontroller 8 Kbytes ROM/OTP, ROMless
Manufacturer
Atmel Corporation
Datasheet
1.TS80C32X2-EDA.pdf
(54 pages)
- Current page: 29 of 54
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Power-off Flag
4184E–8051–09/02
The power-off flag allows the user to distinguish between a “cold start” reset and a
“warm start” reset.
A cold start reset is the one induced by V
V
power-down.
The power-off flag (POF) is located in PCON register (See Table 17.). POF is set by
hardware when V
by software allowing the user to determine the type of reset.
The POF value is only relevant with a Vcc range from 4.5V to 5.5V. For lower Vcc value,
reading POF bit will return indeterminate value.
Table 17. PCON Register
PCON - Power Control Register (87h)
Reset Value = 00X1 0000b
Not bit addressable
CC
SMOD1
Number
is still applied to the device and could be generated for example by an exit from
Bit
7
7
6
5
4
3
2
1
0
SMOD0
Mnemonic
SMOD1
SMOD0
6
POF
GF1
GF0
Bit
IDL
PD
CC
-
rises from 0 to its nominal voltage. The POF can be set or cleared
Description
Serial port Mode bit 1
Set to select double baud rate in mode 1, 2 or 3.
Serial port Mode bit 0
Clear to select SM0 bit in SCON register.
Set to to select FE bit in SCON register.
Reserved
The value read from this bit is indeterminate. Do not set this bit.
Power-off Flag
Clear to recognize next reset type.
Set by hardware when V
set by software.
General purpose Flag
Cleared by user for general purpose usage.
Set by user for general purpose usage.
General purpose Flag
Cleared by user for general purpose usage.
Set by user for general purpose usage.
Power-down mode bit
Cleared by hardware when reset occurs.
Set to enter power-down mode.
Idle mode bit
Clear by hardware when interrupt or reset occurs.
Set to enter idle mode.
5
-
POF
4
CC
switch-on. A warm start reset occurs while
CC
rises from 0 to its nominal voltage. Can also be
GF1
3
GF0
2
TS8xCx2X2
PD
1
IDL
0
29
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