T89C5121-ICUIL Atmel, T89C5121-ICUIL Datasheet - Page 52
T89C5121-ICUIL
Manufacturer Part Number
T89C5121-ICUIL
Description
IC 8051 MCU W/SMART CARD 24SSOP
Manufacturer
Atmel
Series
89Cr
Datasheet
1.89C5121-SK1.pdf
(115 pages)
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
T89C5121-ICSIL
T89C5121-ICSIL
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52
A/T8xC5121
Table 35. ISEL Register
Reset Value = 0000 0100b
Number
CPLEV
Bit
7
7
6
5
4
3
2
1
0
Mnemonic
PRESEN
PRESIT
CPLEV
OELEV
OEIT
OEEN
RXEN
RXIT
Bit
6
-
Description
Card presence detection level
This bit indicates which CPRES level will bring about an interrupt
Set this bit to indicate that Card Presence IT will appear if CPRES is at high
level.
Clear this bit to indicate that Card Presence IT will appear if CPRES is at low
level.
Reserved
The value read from this bit is indeterminate. Do not set this bit.
Card presence detection interrupt flag
Set by hardware
Must be cleared by software
Received data interrupt flag
Set by hardware
Must be cleared by software
OE/INT1 signal active level
Set this bit to indicate that high level is active.
Clear this bit to indicate that low level is active.
OE/INT1 Interrupt Disable bit
Clear to disable INT1 interrupt
Set to enable INT1 interrupt
Card presence detection Interrupt Enable bit
Clear to disable the card presence detection interrupt coming from SCIB.
Set to enable the card presence detection interrupt coming from SCIB.
Received data Interrupt Enable bit
Clear to disable the RxD interrupt.
Set to enable the RxD interrupt (a minimal bit width of 0.1 ms is required to
wake up from Power-Down).
PRESIT
5
RXIT
4
OELEV
3
OEEN
2
PRESEN
1
4164G–SCR–07/06
RXEN
0
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