T89C5121-ICUIL Atmel, T89C5121-ICUIL Datasheet - Page 40

• 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

40
A/T8xC5121
Table 17. SCISR Register
SCISR (S:ADh, SCRS = 0)
Smart Card UART Interface Status Register
Reset Value = 1000 0000b
Number
SCTBE
Bit
7
6
5
4
3
2
1
0
7
Mnemonic
CIccOVF
CARDIN
CVccOK
SCWTO
CARDIN
SCTBE
SCTC
SCRC
SCPE
Bit
6
Description
SCIB transmit buffer empty
This bit is set by hardware when the Transmit Buffer is copied to the transmit shift
register of the Smart Card UART.
It is cleared by hardware when SCTBUF is written to.
Card presence status
This bit is set when a card is detected (debouncing filter has to be done in
software).
It is cleared otherwise.
ICC overflow on card
This bit is set when the current on card is above the limit
It shall be cleared by the hardware .
Smart card wait Timeout
This bit is set by hardware when the Smart card wait time counter times out.
It shall be cleared by the reload of the counter or by the reset of the SCIB.
Smart card transmitted character
This bit is set by hardware when the Smart Card UART has transmitted a
character.
It shall be cleared by software after this register has been read.
Smart card received character
This bit is set by hardware when the Smart Card UART has received a character
It is cleared by hardware when SCBUF is read.
Smart card parity error
This bit is set at the same time as SCTI or SCRI if a parity error is detected.
It shall be cleared by software after this register has been read.
Card voltage status
This bit is set when the output voltage is within the voltage range specified by
CVcc field.
It is cleared otherwise.
CIccOVF
5
CVccOK
4
SCWTO
3
SCTC
2
SCRC
1
4164G–SCR–07/06
SCPE
0