ST72124J2 STMicroelectronics, ST72124J2 Datasheet - Page 13

• Manufacturer Part Number: ST72124J2
• Description: 8-BIT MCU WITH SINGLE VOLTAGE FLASH MEMORY,ADC, 16-BIT TIMERS, SPI, SCI INTERFACES
• Manufacturer: STMicroelectronics

Specifications of ST72124J2

• Clock Sources: crystal/ceramic resonator oscillators or RC oscillators, external clock, backup Clock Security System
• 4 Power Saving Modes: Halt, Active-Halt, Wait and Slow
• Two 16-bit Timers With: 2 input captures (only one on timer A), 2 output compares (only one on timer A), External clock input on timer A, PWM and Pulse generator modes

4 REGISTER & MEMORY MAP
As shown in the
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
8 Kbytes of user program memory. The RAM
Figure 5. Memory Map
01FFh
0200h / 0280h
E000h
FFDFh
027Fh
C000h
007Fh
0BFFh
0CFFh
BFFFh
FFFFh
0080h
0C00h
0D00h
FFE0h
0000h
Interrupt & Reset Vectors
(see
256 Bytes Data EEPROM
Figure
8K Bytes
Program
Memory
Table 5 on page
HW Registers
512 Bytes RAM
(see
Reserved
Reserved
5, the MCU is capable of
384 Bytes RAM
Table
16K Bytes
Program
Memory
2)
34)
space includes up to 256 bytes for the stack from
0100h to 01FFh.
The highest address bytes contain the user reset
and interrupt vectors.
IMPORTANT: Memory locations marked as “Re-
served” must never be accessed. Accessing a re-
served area can have unpredictable effects on the
device.
ST72334J/N, ST72314J/N, ST72124J
0080h
00FFh
01FFh
01FFh
00FFh
027Fh
C000h
E000h
FFFFh
0100h
0200h
0080h
0100h
16-bit Addressing RAM
16-bit Addressing RAM
Short Addressing RAM
Short Addressing RAM
16-bit Addressing
8 KBytes
(256 Bytes)
(256 Bytes)
(128 Bytes)
(128 Bytes)
Zero page
Zero page
Stack or
Stack or
16 KBytes
RAM
13/153