ST72C334N2B6 STMicroelectronics, ST72C334N2B6 Datasheet - Page 17

• Manufacturer Part Number: ST72C334N2B6
• Description: Microcontrollers (MCU) Flash 8K SPI/SCI
• Manufacturer: STMicroelectronics

Specifications of ST72C334N2B6

• Data Bus Width: 8 bit
• Program Memory Type: Flash
• Program Memory Size: 8 KB
• Data Ram Size: 384 B
• Interface Type: SCI, SPI
• Maximum Clock Frequency: 8 MHz
• Number Of Programmable I/os: 44
• Number Of Timers: 16 bit
• Operating Supply Voltage: 3.2 V to 5.5 V
• Maximum Operating Temperature: + 85 C
• Mounting Style: Through Hole
• Package / Case: SDIP-56
• Minimum Operating Temperature: - 40 C
• On-chip Adc: 8 bit
• Lead Free Status / Rohs Status: No

2.6 DATA EEPROM
2.6.1 Introduction
The Electrically Erasable Programmable Read
Only Memory can be used as a non volatile back-
up for storing data. Using the EEPROM requires a
basic access protocol described in this chapter.
Figure 7. EEPROM Block Diagram
EECSR
EEPROM INTERRUPT
0
ADDRESS BUS
0
RESERVED
DECODER
ADDRESS
0
0
0
4
IE
EEPROM
DECODER
LAT
DETECTOR
FALLING
4
4
ROW
EDGE
PGM
2.6.2 Main Features
Up to 16 Bytes programmed in the same cycle
EEPROM mono-voltage (charge pump)
Chained erase and programming cycles
Internal control of the global programming cycle
duration
End of programming cycle interrupt flag
WAIT mode management
ST72334J/N, ST72314J/N, ST72124J
128
MULTIPLEXER
DATA
(1 ROW = 16 x 8 BITS)
MEMORY MATRIX
HIGH VOLTAGE
EEPROM
DATA BUS
PUMP
DATA LATCHES
128
16 x 8 BITS
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