AT94K40AL-25BQC Atmel, AT94K40AL-25BQC Datasheet - Page 129
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AT94K40AL-25BQC
Manufacturer Part Number
AT94K40AL-25BQC
Description
IC FPSLIC 40K GATE 25MHZ 144LQFP
Manufacturer
Atmel
Series
FPSLIC®r
Specifications of AT94K40AL-25BQC
Core Type
8-bit AVR
Speed
18MHz
Interface
I²C, UART
Program Sram Bytes
20K-32K
Fpga Sram
18kb
Data Sram Bytes
4K ~ 16K
Fpga Core Cells
2304
Fpga Gates
40K
Fpga Registers
2862
Voltage - Supply
3 V ~ 3.6 V
Mounting Type
Surface Mount
Operating Temperature
0°C ~ 70°C
Package / Case
144-LQFP
For Use With
ATSTK594 - BOARD FPSLIC DAUGHTER FOR STK500
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Eeprom Size
-
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4.29
4.29.1
1138I–FPSLI–1/08
UARTs
Data Transmission
The FPSLIC features two full duplex (separate receive and transmit registers) Universal Asyn-
chronous Receiver and Transmitter (UART). The main features are:
A block schematic of the UART transmitter is shown in
and the functionality is described in general for the two UARTs.
Figure 4-41. UART Transmitter
Note:
• 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
XTAL
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
AT94KAL Series FPSLIC
REGISTER (UDRn)
SHIFT REGISTER
UART I/O DATA
10(11)-BIT TX
Figure
UART CONTROL AND
TXCn
STATUS REGISTER
IRQ
(UCSRnA)
4-41. The two UARTs are identical
UDREn
IRQ
TXDn
PIN CONTROL
LOGIC
PE0/
PE2
129
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