AT83C5135 Atmel Corporation, AT83C5135 Datasheet - Page 32

• Manufacturer Part Number: AT83C5135
• Manufacturer: Atmel Corporation

Specifications of AT83C5135

• Max. Operating Frequency: 32 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): 512
• Operating Voltage (vcc): 2.7 to 3.6
• Timers: 4
• Mask Rom (kbytes): 16
• Watchdog: Yes

32
AT83C5134/35/36
Reset Value = 0X0X 1100b
Not bit addressable
Number
Bit
4
3
2
1
0
Mnemonic
EXTRAM
XRS1
XRS0
AO
Bit
-
Description
Reserved
The value read from this bit is indeterminate. Do not set this bit
ERAM Size
XRS1XRS0
0
0
1
1
EXTRAM bit
Cleared to access internal ERAM using MOVX at Ri at DPTR.
Set to access external memory.
ALE Output bit
Cleared, ALE is emitted at a constant rate of 1/6 the oscillator frequency (or 1/3 if X2
mode is used) (default).
Set, ALE is active only when a MOVX or MOVC instruction is used.
0
1
0
1
ERAM size
256 bytes
512 bytes
768 bytes
1024 bytes (default)
7683C–USB–11/07