T89C5121-ICUIL Atmel, T89C5121-ICUIL Datasheet - Page 43

• 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

4164G–SCR–07/06
Table 20. SCSR Register
SCSR (S:ABh) Smart Card Selection Register
Reset Value = XXX0 1000b
Table 21. SCTBUF Register
SCTBUF (S:AA, write-only, SCRS = 0) Smart Card Transmit Buffer Register
Reset Value = 0000 0000b
Bit Number
Number
Bit
3-2
7
7
-
7
6
5
4
1
0
–
Mnemonic Description
CREPSEL
ALTKPS1
ALTKPS0
Bit Mnemonic Description
SCCLK1
SCRS
Bit
6
6
-
-
-
-
–
Reserved
Reserved
Reserved
Character repetition selection
Clear this bit to select 5 times repetition before parity error indication
Set this bit to select 4 times repetition before parity error indication
Alternate Card Clock prescaler factor
00ALTKPS = 0: prescaler factor equals 1
01ALTKPS = 1: prescaler factor equals 2
10ALTKPS = 2: prescaler factor equals 4 (reset value)
11ALTKPS = 3: prescaler factor equals 8
Alternate card clock selection
Set to select the prescaled clock (CCLK1)
Clear to select the standard port configuration (P3.6)
Smart card register selection
The SCRS bit selects which set of the SCIB registers is accessed.
Can store a new byte to be transmitted on the I/O pin when SCTBE is set.
Bit ordering on the I/O pin depends on the Convention (see SCICR
Register).
5
5
-
CREPSEL
4
4
ALTKPS1
3
3
ALTKPS0
2
2
A/T8xC5121
SCCLK1
1
1
SCRS
0
0
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