AT83C5135 Atmel Corporation, AT83C5135 Datasheet - Page 54
AT83C5135
Manufacturer Part Number
AT83C5135
Description
Manufacturer
Atmel Corporation
Datasheet
1.AT83C5134.pdf
(166 pages)
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
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AT83C5134/35/36
Reset Value = 0000 0000b
Bit addressable
Number
Bit
7
6
5
4
3
2
1
0
Mnemonic
REN
SM0
SM1
SM2
RB8
TB8
Bit
FE
RI
TI
Description
Framing Error bit (SMOD0 = 1)
Clear to reset the error state, not cleared by a valid stop bit.
Set by hardware when an invalid stop bit is detected.
SMOD0 must be set to enable access to the FE bit
Serial port Mode bit 0
Refer to SM1 for serial port mode selection.
SMOD0 must be cleared to enable access to the SM0 bit
Serial port Mode bit 1
SM0 SM1
0
0
1
1
Serial port Mode 2 bit/Multiprocessor Communication Enable bit
Clear to disable multiprocessor communication feature.
Set to enable multiprocessor communication feature in mode 2 and 3, and eventually
mode 1. This bit should be cleared in mode 0.
Reception Enable bit
Clear to disable serial reception.
Set to enable serial reception.
Transmitter Bit 8/Ninth bit to Transmit in Modes 2 and 3
Clear to transmit a logic 0 in the 9th bit.
Set to transmit a logic 1 in the 9th bit.
Receiver Bit 8/Ninth bit received in modes 2 and 3
Cleared by hardware if 9th bit received is a logic 0.
Set by hardware if 9th bit received is a logic 1.
In mode 1, if SM2 = 0, RB8 is the received stop bit. In mode 0 RB8 is not used.
Transmit Interrupt flag
Clear to acknowledge interrupt.
Set by hardware at the end of the 8th bit time in mode 0 or at the beginning of the stop bit
in the other modes.
Receive Interrupt flag
Clear to acknowledge interrupt.
Set by hardware at the end of the 8th bit time in mode 0, see Figure 14-2. and Figure 14-
3. in the other modes.
0
1
0
1
Mode
0
1
2
3
Description
Shift Register
8-bit UART
9-bit UART
9-bit UART
Baud Rate
F
Variable
F
Variable
CPU PERIPH
CPU PERIPH/
/6
32 or/16
7683C–USB–11/07
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