AT89C5122D-PSTUM Atmel, AT89C5122D-PSTUM Datasheet - Page 22
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
-
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Registers
22
AT83R5122, AT8xC5122/23
Table 5. Auxiliary Register - AUXR (8Eh)
Reset Value = 0XXX X000b
Number
Bit
DPU
6-3
7
2
1
0
7
Mnemonic Description
EXTRAM
XRS0
DPU
Bit
AO
-
6
-
Disable weak Pull-up
Reserved
The value read from this bit is indeterminate. Do not change these bits.
XRAM Size
EXTRAM bit
Cleared to access internal XRAM using MOVX @ Ri/ @ DPTR.
Set to access external memory.
Programmed by hardware after Power-up regarding Hardware Security Byte
(HSB), default setting , XRAM selected.
ALE Output bit
Cleared , ALE is emitted at a constant rate of 1/6 the oscillator frequency (or 1/3 if
X2 mode is used)(default).
Set , ALE is active only when a MOVX or MOVC instruction is used.
0
1
0
1
5
-
4
-
weak pull-up is enabled
weak pull-up is disabled
256 bytes (default)
512 bytes
3
XRS0
2
EXTRAM
1
4202F–SCR–07/2008
AO
0
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