ST72C334N2B6 STMicroelectronics, ST72C334N2B6 Datasheet - Page 12

• 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

ST72334J/N, ST72314J/N, ST72124J
2.3 REGISTER & MEMORY MAP
As shown in the Figure 5, the MCU is capable of
addressing 64K bytes of memories and I/O regis-
ters.
The available memory locations consist of 128
bytes of register locations, 384 or 512 bytes of
RAM, up to 256 bytes of data EEPROM and 4 or
Figure 5. Memory Map
12/125
01FFh
0200h / 0280h
E000h
027Fh
0CFFh
FFDFh
007Fh
0BFFh
BFFFh
FFFFh
0080h
0C00h
0D00h
C000h
FFE0h
0000h
Interrupt & Reset Vectors
256 Bytes Data EEPROM
8K Bytes
(see Table 6 page 37)
Program
Memory
HW Registers
512 Bytes RAM
(see Table 2)
Reserved
Reserved
384 Bytes RAM
16K Bytes
Program
Memory
8 Kbytes of user program memory. The RAM
space includes up to 256 bytes for the stack from
0100h to 01FFh.
The highest address bytes contain the user reset
and interrupt vectors.
0080h
00FFh
01FFh
01FFh
0100h
00FFh
0200h
027Fh
0080h
0100h
16-bit Addressing RAM
16-bit Addressing RAM
Short Addressing
RAM (zero page)
Short Addressing
RAM (zero page)
16-bit Addressing
256 Bytes Stack or
256 Bytes Stack or
RAM