T89C5121-ICUIL Atmel, T89C5121-ICUIL Datasheet - Page 46

• Manufacturer Part Number: T89C5121-ICUIL
• Description: IC 8051 MCU W/SMART CARD 24SSOP
• Manufacturer: Atmel
• Series: 89Cr

Specifications of T89C5121-ICUIL

• Core Processor: 8051
• Core Size: 8-Bit
• Speed: 16MHz
• Connectivity: SmartCard, UART/USART
• Peripherals: LED, POR, WDT
• Number Of I /o: 14
• Program Memory Size: 16KB (16K x 8)
• Program Memory Type: Flash RAM
• Eeprom Size: 16K x 8
• Ram Size: 256 x 8
• Voltage - Supply (vcc/vdd): 2.85 V ~ 5.4 V
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 24-SSOP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Data Converters: -
• Other names: Q1468934; T89C5121-ICSIL; T89C5121-ICSIL

46
A/T8xC5121
Table 27. SCWT2 Register
SCWT2 (S:B6h, SCRS = 0)
Smart Card Character/Block Wait Time Register 2
Reset Value = 0000 0000b
Table 28. SCWT1 Register
SCWT1 (S:B5h, SCRS = 0) Smart Card Character/Block Wait Time Register 1
Reset Value = 0010 0101b
Table 29. SCWT0 Register
SCWT0 (S:B4h, SCRS = 0)
Smart Card Character/Block Wait Time Register 0
Reset Value = 1000 0000b
Number
Number
Number
WT23
WT15
WT7
Bit
Bit
Bit
7-0
7-0
7-0
7
7
7
Mnemonic Description
Mnemonic Description
Mnemonic Description
WT[23:16]
WT[15:8]
WT[7:0]
WT22
WT14
WT6
Bit
Bit
Bit
6
6
6
Wait Time Byte 2
Used together with WT[15:0] (see SCWT0 Register).
Wait Time Byte 1
Used together with WT[23:16] and WT[7:0] (see SCWT0 Register).
Wait Time Byte 0
WT[23:0] is the reload value of the Wait Time counter WTC.
The WTC is a general-purpose Timer 0. It is using the ETU clock and is
controlled by the WTEN bit (see Section “Waiting Time Counter (WT)”).
When UART bit of SCICR Register 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
WT18
WT10
WT2
2
2
2
WT17
WT9
WT1
1
1
1
4164G–SCR–07/06
WT16
WT8
WT0
0
0
0