AT94K05AL ATMEL Corporation, AT94K05AL Datasheet - Page 119
AT94K05AL
Manufacturer Part Number
AT94K05AL
Description
Fpslic Devices Combine 5K Gates of Atmel's Patented AT40K Fpga Architecture, a 20 Mips Avr 8-bit Risc Microprocessor Core, Numerous Fixed Microcontroller Peripheries And up to 36K Bytes of Program And Data SRAM.
Manufacturer
ATMEL Corporation
Datasheet
1.AT94K05AL.pdf
(192 pages)
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UARTs
Data Transmission
Rev. 1138F–FPSLI–06/02
The FPSLIC features two full duplex (separate receive and transmit registers) Universal Asyn-
chronous Receiver and Transmitter (UART). The main features are:
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A block schematic of the UART transmitter is shown in Figure 64. The two UARTs are identical
and the functionality is described in general for the two UARTs.
Figure 64. UART Transmitter
Note:
XTAL
Baud-rate Generator Generates any Baud-rate
High Baud-rates at Low XTAL Frequencies
8 or 9 Bits Data
Noise Filtering
Overrun Detection
Framing Error Detection
False Start Bit Detection
Three Separate Interrupts on TX Complete, TX Data Register Empty and RX Complete
Multi-processor Communication Mode
Double Speed UART Mode
1. n = 0, 1
CONTROL LOGIC
GENERATOR
BAUD RATE
STORE UDRn
SHIFT ENABLE
BAUD x 16
IDLE
(1)
UART CONTROL AND
STATUS REGISTER
/16
DATA BUS
BAUD
(UCSRnB)
DATA BUS
REGISTER (UDRn)
SHIFT REGISTER
UART I/O DATA
10(11)-BIT TX
AT94K Series FPSLIC
UART CONTROL AND
TXCn
STATUS REGISTER
IRQ
(UCSRnA)
UDREn
IRQ
TXDn
PIN CONTROL
LOGIC
PE0/
PE2
119
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