AT90PWM1-16MU Atmel, AT90PWM1-16MU Datasheet - Page 221

• Manufacturer Part Number: AT90PWM1-16MU
• Description: IC AVR PWM 8KB FLASH 16MHZ 32QFN
• Manufacturer: Atmel
• Series: AVR® 90PWM Lightingr

Specifications of AT90PWM1-16MU

• Core Processor: AVR
• Core Size: 8-Bit
• Speed: 16MHz
• Connectivity: SPI
• Peripherals: Brown-out Detect/Reset, POR, PWM, WDT
• Number Of I /o: 19
• Program Memory Size: 8KB (8K x 8)
• Program Memory Type: FLASH
• Eeprom Size: 512 x 8
• Ram Size: 512 x 8
• Voltage - Supply (vcc/vdd): 2.7 V ~ 5.5 V
• Data Converters: A/D 8x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 105°C
• Package / Case: 32-QFN
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

22.2
22.3
4378C–AVR–09/08
Fuse Bits
PSC Output Behaviour During Reset
The AT90PWM1 has three Fuse bytes.
all the fuses and how they are mapped into the Fuse bytes. Note that the fuses are read as logi-
cal zero, “0”, if they are programmed.
Table 76. Extended Fuse Byte
Note:
For external component safety reason, the state of PSC outputs during Reset can be pro-
grammed by fuses PSCRV, PSC0RB, PSC1RB & PSC2RB.
These fuses are located in the Extended Fuse Byte ( see
PSCRV gives the state low or high which will be forced on PSC outputs selected by PSC0RB,
PSC2RB fuses.
If PSCRV fuse equals 0 (programmed), the selected PSC outputs will be forced to low state. If
PSCRV fuse equals 1 (unprogrammed), the selected PSC outputs will be forced to high state.
If PSC0RB fuse equals 1 (unprogrammed), PSCOUT00 & PSCOUT01 keep a standard port
behaviour. If PSC0RB fuse equals 0 (programmed), PSCOUT00 & PSCOUT01 are forced at
reset to low level or high level according to PSCRV fuse bit. In this second case, PSCOUT00 &
PSCOUT01 keep the forced state until PSOC0 register is written..
If PSC2RB fuse equals 1 (unprogrammed), PSCOUT20, PSCOUT21, PSCOUT22 &
PSCOUT23 keep a standard port behaviour. If PSC1RB fuse equals 0 (programmed),
PSCOUT20, PSCOUT21, PSCOUT22 & PSCOUT23 are forced at reset to low level or high
level according to PSCRV fuse bit. In this second case, PSCOUT20, PSCOUT21, PSCOUT22 &
PSCOUT23 keep the forced state until PSOC2 register is written.
Extended Fuse Byte
PSC2RB
PSC0RB
PSCRV
–
BOOTSZ1
BOOTSZ0
BOOTRST
1. The default value of BOOTSZ1..0 results in maximum Boot Size. See
for details.
Bit No
7
5
4
3
2
1
0
Description
PSC2 Reset Behaviour
PSC0 Reset Behaviour
PSCOUT Reset Value
–
Select Boot Size
(see Table 113 for details)
Select Boot Size
(see Table 113 for details)
Select Reset Vector
Table 76
-
Table 78
Table
describe briefly the functionality of
76)
Default Value
1
1
1
0 (programmed)
0 (programmed)
1 (unprogrammed)
1
AT90PWM1
Table 79 on page 224
(1)
(1)
221