T89C5121-ICUIL Atmel, T89C5121-ICUIL Datasheet - Page 64

• 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

Figure 26. Hardware in Relation with the Two Communication Protocols
EEPROM Mapping
64
A/T8xC5121
BOOTLOADER
P3.7/CRST1
P3.2/INT0
P2.1
P2.0
UART
DV
V
V
V
CC
CC
CC
SS
The 16K Bytes EEPROM mapping is the following:
The three last bytes are reserved respectively:
•
•
The use of these bytes is described in the following paragraphs.
Therefore, the User Program must be mapped from 0000h to 3FFCh address.
Software Security Byte: address 3FFDh
CRC Bytes: address 3FFEh and 3FFFh
TWI
TWI
Internal EEPROM
AT24C128
(default values if not tied)
wp = 0
Address = 00h
A0 = A1 = 0
SDA
SCL
SDA
SCL
DV
CC
3FFD
3FFE
3FFF
EEPROM external
AT24C128
DVss Wp = 1
0000h
or Ext.V
(A0 = 1,A1 = 0)
Address = 01h
DV
CC
CC
or Ext. V
Reserved address
(3V)
ISP Software Tool
Optional
Thanks to internal pull-ups
CC
(3V)
4164G–SCR–07/06