atmega32c1 ATMEL Corporation, atmega32c1 Datasheet - Page 291

• Manufacturer Part Number: atmega32c1
• Description: Atmega32m1 Automotive 8-bit Avr Microcontroller With 32k/64k Bytes In-system Programmable Flash
• Manufacturer: ATMEL Corporation

24.3
7647A–AVR–02/08
PSC Output Behavior During Reset
Table 24-4.
Note:
For external component safety reason, the state of PSC outputs during Reset can be pro-
grammed by fuses PSCRB, PSCARV & PSCBRV.
These fuses are located in the Extended Fuse Byte ( see
If PSCRB fuse equals 1 (unprogrammed), all PSC outputs keep a standard port behaviour. If
PSC0RB fuse equals 0 (programmed), all PSC outputs are forced at reset to low level or high
level according to PSCARV and PSCBRV fuse bits. In this second case, the PSC outputs keep
the forced state until POC register is written.
149.
PSCARV (PSCOUTnA Reset Value) gives the state low or high which will be forced on
PSCOUT0A, PSCOUT1A and PSCOUT2A outputs when PSCRB is programmed. If PSCARV
fuse equals 0 (programmed), the PSCOUT0A, PSCOUT1A and PSCOUT2A outputs will be
forced to high state. If PSCRV fuse equals 1 (unprogrammed), the PSCOUT0A, PSCOUT1A
and PSCOUT2A outputs will be forced to low state.
PSCBRV (PSCOUTnB Reset Value) gives the state low or high which will be forced on
PSCOUT0B, PSCOUT1B and PSCOUT2B outputs when PSCRB is programmed. If PSCBRV
fuse equals 0 (programmed), the PSCOUT0B, PSCOUT1B and PSCOUT2B outputs will be
forced to high state. If PSCRV fuse equals 1 (unprogrammed), the PSCOUT0B, PSCOUT1B
and PSCOUT2B outputs will be forced to low state.
Table 24-5.
Extended Fuse Byte
BODLEVEL2
BODLEVEL1
BODLEVEL0
PSCRB
unprogrammed
programmed
programmed
programmed
programmed
BODLEVEL2
BODLEVEL1
BODLEVEL0
1. See
(1)
(1)
(1)
(1)
(1)
(1)
Extended Fuse Byte
PSC Output Behavior During and after Reset until POC register is written
Table 7-2 on page 47
unprogrammed
unprogrammed
programmed
programmed
Bit No
PSCARV
2
1
0
X
for BODLEVEL Fuse decoding.
Description
Brown-out Detector trigger
level
Brown-out Detector trigger
level
Brown-out Detector trigger
level
See “PSC Output Configuration – POC” on page
unprogrammed
unprogrammed
programmed
programmed
PSCBRV
X
2
1
0
ATmega32/64/M1/C1
Table
24-4)
PSCOUTnA
normal port
forced low
forced low
forced high
forced high
Brown-out
Detector
trigger level
Brown-out
Detector
trigger level
Brown-out
Detector
trigger level
Default Value
1 (unprogrammed)
1 (unprogrammed)
1 (unprogrammed)
PSCOUTnB
normal port
forced low
forced high
forced low
forced high
1
(unprogramme
d)
1
(unprogramme
d)
1
(unprogramme
d)
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