AT89C5131A-M Atmel Corporation, AT89C5131A-M Datasheet - Page 157

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AT89C5131A-M

Manufacturer Part Number
AT89C5131A-M
Description
Manufacturer
Atmel Corporation
Datasheets

Specifications of AT89C5131A-M

Flash (kbytes)
32 Kbytes
Max. Operating Frequency
48 MHz
Cpu
8051-12C
Max I/o Pins
34
Usb Transceiver
1
Usb Speed
Full Speed
Usb Interface
Device
Spi
1
Twi (i2c)
1
Uart
1
Sram (kbytes)
1.25
Eeprom (bytes)
1024
Self Program Memory
API
Operating Voltage (vcc)
2.7 to 5.5
Timers
4
Isp
UART/USB
Watchdog
Yes
24.3
4337K–USB–04/08
Registers
Table 24-2.
PCON (S:87h)
Power Control Register
Reset Value = 10h
Bit Number
SMOD1
7
7
6
5
4
3
2
1
0
Mnemonic
PCON Register
SMOD0
SMOD1
SMOD0
POF
GF1
GF0
IDL
PD
Bit
6
-
Description
Serial Port Mode bit 1
Set to select double baud rate in mode 1, 2 or 3.
Serial Port Mode bit 0
Set to select FE bit in SCON register.
Clear to select SM0 bit in SCON register
Reserved
The value read from this bit is always 0. Do not set this bit.
Power-Off Flag
Set by hardware when V
software.
Clear to recognize next reset type.
General-purpose Flag 1
Set by software for general-purpose usage.
Cleared by software for general-purpose usage.
General-purpose Flag 0
Set by software for general-purpose usage.
Cleared by software for general-purpose usage.
Power-down mode bit
Set this bit to enter in power-down mode.
Cleared by hardware when reset occurs.
Idle mode bit
Set this bit to enter in Idle mode.
Cleared by hardware when interrupt or reset occurs.
5
-
POF
4
CC
rises from 0 to its nominal voltage. Can also be set by
GF1
3
AT89C5130A/31A-M
GF0
2
PD
1
IDL
0
157

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