AT94K05AL-25BQU Atmel, AT94K05AL-25BQU Datasheet - Page 135
AT94K05AL-25BQU
Manufacturer Part Number
AT94K05AL-25BQU
Description
IC FPSLIC 5K GATE 25MHZ 144-LQFP
Manufacturer
Atmel
Series
FPSLIC®r
Datasheet
1.AT94K05AL-25AJI.pdf
(204 pages)
Specifications of AT94K05AL-25BQU
Core Type
8-bit AVR
Speed
25MHz
Interface
I²C, UART
Program Sram Bytes
4K-16K
Fpga Sram
2kb
Data Sram Bytes
4K ~ 16K
Fpga Core Cells
256
Fpga Gates
5K
Fpga Registers
436
Voltage - Supply
3 V ~ 3.6 V
Mounting Type
Surface Mount
Operating Temperature
-40°C ~ 85°C
Package / Case
144-LQFP
For Use With
ATSTK594 - BOARD FPSLIC DAUGHTER FOR STK500
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Eeprom Size
-
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1138I–FPSLI–1/08
This bit is set if an Overrun condition is detected, i.e., when a character already present in the
UDRn register is not read before the next character has been shifted into the Receiver Shift reg-
ister. The ORn bit is buffered, which means that it will be set once the valid data still in UDRn is
read.
The ORn bit is cleared (zero) when data is received and transferred to UDRn.
• Bit 2 - Res: Reserved Bit
This bit is reserved in the AT94K and will always read as zero.
• Bits 1 - U2X0/U2X1: Double the UART Transmission Speed
When this bit is set (one) the UART speed will be doubled. This means that a bit will be transmit-
ted/received in eight CPU clock periods instead of 16 CPU clock periods. For a detailed
description, see
• Bit 0 - MPCM0/MPCM1: Multi-processor Communication Mode
This bit is used to enter Multi-processor Communication Mode. The bit is set when the Slave
MCU waits for an address byte to be received. When the MCU has been addressed, the MCU
switches off the MPCMn bit, and starts data reception.
For a detailed description, see
UART0 Control and Status Registers – UCSR0B
UART1 Control and Status Registers – UCSR1B
• Bit 7 - RXCIE0/RXCIE1: RX Complete Interrupt Enable
When this bit is set (one), a setting of the RXCn bit in UCSRnA will cause the Receive Complete
interrupt routine to be executed provided that global interrupts are enabled.
• Bit 6 - TXCIE0/TXCIE1: TX Complete Interrupt Enable
When this bit is set (one), a setting of the TXCn bit in UCSRnA will cause the Transmit Complete
interrupt routine to be executed provided that global interrupts are enabled.
• Bit 5 - UDRIE0/UDREI1: UART Data Register Empty Interrupt Enable
When this bit is set (one), a setting of the UDREn bit in UCSRnA will cause the UART Data Reg-
ister Empty interrupt routine to be executed provided that global interrupts are enabled.
• Bit 4 - RXEN0/RXEN1: Receiver Enable
This bit enables the UART receiver when set (one). When the receiver is disabled, the TXCn,
ORn and FEn status flags cannot become set. If these flags are set, turning off RXENn does not
cause them to be cleared.
Bit
$0A ($2A)
Read/Write
Initial Value
Bit
$01 ($21)
Read/Write
Initial Value
7
RXCIE0
R/W
0
7
RXCIE1
R/W
0
“Double Speed Transmission” on page
6
TXCIE0
R/W
0
6
TXCIE1
R/W
0
“Multi-processor Communication Mode” on page
5
UDRIE0
R/W
0
5
UDRIE1
R/W
0
4
RXEN0
R/W
0
4
RXEN1
R/W
0
AT94KAL Series FPSLIC
TXEN0
R/W
TXEN1
R/W
3
0
3
0
138”.
2
CHR90
R/W
0
2
CHR91
R/W
0
1
RXB80
R
1
1
RXB81
R
1
0
TXB80
R/W
0
0
TXB81
R/W
0
133.
UCSR0B
UCSR1B
135
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