AT89C5122D-PSTUM Atmel, AT89C5122D-PSTUM Datasheet - Page 76
AT89C5122D-PSTUM
Manufacturer Part Number
AT89C5122D-PSTUM
Description
IC 8051 MCU FLASH 32K 64QFN
Manufacturer
Atmel
Series
89Cr
Datasheet
1.AT89C5122D-PSTUM.pdf
(208 pages)
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
-
- Current page: 76 of 208
- Download datasheet (3Mb)
Alternate Card
Registers
76
AT83R5122, AT8xC5122/23
A second card named ‘Alternate Card’ can be controlled.
The Clock signal CCLK1 can be adapted to the XTAL frequency. Thanks to the clock
prescaler which can divide the frequency by 1, 2, 4 or 8. The bits ALTKPS0 and
ALTKPS1 in SCSR Register are used to set this factor.
Figure 44. Alternate Card
There are fifteen registers to control the SCIB macro-cell. They are described from
Table 58 to Table 45.
Some of the register widths are greater than a byte. Despite the 8 bits access provided
by the BIU, the address mapping of this kind of register respects the following rule :
The Low significant byte register is implemented at the higher address.
This implementation makes access to these registers easier when using high level pro-
gramming languages (C,C++).
CK_IDLE
SCSR Reg.
ALTKPS0,1
PR3
1, 1/2, 1/4 or 1/8
P1.7
SCSR Reg.
SCCLK1
1
0
CVCC
CRST
CIO
CCLK
CPRES
CCLK1
SIM, SAM
SMART
CARD
CARD
4202F–SCR–07/2008
Alternate
Main
card
card
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