AT89C5122D-PSTUM Atmel, AT89C5122D-PSTUM Datasheet - Page 85

• Manufacturer Part Number: AT89C5122D-PSTUM
• Description: IC 8051 MCU FLASH 32K 64QFN
• Manufacturer: Atmel
• Series: 89Cr

Specifications of AT89C5122D-PSTUM

• Core Processor: 8051
• Core Size: 8-Bit
• Speed: 48MHz
• Connectivity: SmartCard, SPI, UART/USART, USB
• Peripherals: LED, POR, WDT
• Number Of I /o: 46
• Program Memory Size: 32KB (32K x 8)
• Program Memory Type: FLASH
• Ram Size: 768 x 8
• Voltage - Supply (vcc/vdd): 3 V ~ 5.5 V
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 64-QFN
• For Use With: AT89STK-10 - KIT EVAL APPL MASS STORAGEAT89STK-03 - KIT STARTER FOR MCU AT8XC5122/23
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Data Converters: -

Table 56. Smart Card Character/Block Waiting Time Register 2
SCWT2 (S:B6h, SCRS=0)
Reset Value = 0000 0000b
Table 57. Smart Card Character/Block Waiting Time Register 1
SCWT1 (S:B5h, SCRS=0)
Reset Value = 0010 0101b
Table 58. Smart Card Character/Block Waiting Time Register 0
SCWT0 (S:B4h, SCRS=0)
Reset Value = 1000 0000b
4202F–SCR–07/2008
Bit Number
Bit Number
Bit Number
WT23
WT15
7 - 0
7 - 0
WT7
7 - 0
7
7
7
Bit Mnemonic
Bit Mnemonic
Bit Mnemonic
WT[23:16]
WT[15:8]
WT[7:0]
WT22
WT14
WT6
6
6
6
Description
Waiting Time Byte2
Used together with WT[31:24] and WT[15:0] in registers SCWT3,SCWT1, SCWT0 (see Table 58).
Description
Waiting Time Byte 1
Used together with WT[31:16] and WT[7:0] in registers SCWT3,SCWT2, SCWT0 (see Table 55).
Description
Waiting Time Byte 0
WT[31:0] is the reload value of the Waiting Time Counter (WTC).
The WTC is a general-purpose timer. It is using the ETU clock and is controlled by the WTEN bit (see Table 44 on
page 77 and Section “Waiting Time (WT) Counter”, page 67).
When UART bit of Registers is set, the WTC is automatically reloaded at each start bit of the UART. It is used to
check the maximum time between to consecutive start bits.
WT21
WT13
WT5
5
5
5
WT20
WT12
WT4
4
4
4
WT19
WT11
WT3
3
3
3
AT83R5122, AT8xC5122/23
WT18
WT10
WT2
2
2
2
WT17
WT9
WT1
1
1
1
WT16
WT8
WT0
0
0
0
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