ST72324BK2 STMicroelectronics, ST72324BK2 Datasheet - Page 27

• Manufacturer Part Number: ST72324BK2
• Description: 5V RANGE 8-BIT MCU WITH 8 TO 32K FLASH/ROM, 10-BIT ADC, 4 TIMERS, SPI, SCI INTERFACE
• Manufacturer: STMicroelectronics

Specifications of ST72324BK2

• Hdflash Endurance: 1 kcycle at 55 °C, data retention 40 years at 85 °C
• Clock Sources: crystal/ceramic resonator oscillators, int. RC osc. and ext. clock input
• 4 Power Saving Modes: Slow, Wait, Active-halt, and Halt

ST72324Bxx
5
5.1
5.2
5.3
Central processing unit (CPU)
Introduction
This CPU has a full 8-bit architecture and contains six internal registers allowing efficient 8-
bit data manipulation.
Main features
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CPU registers
The six CPU registers shown in
accessed by specific instructions.
Figure 9.
Reset value = stack higher address
Reset value = reset vector @ FFFEh-FFFFh
15
15
Enable executing 63 basic instructions
Fast 8-bit by 8-bit multiply
17 main addressing modes (with indirect addressing mode)
Two 8-bit index registers
16-bit stack pointer
Low power Halt and Wait modes
Priority maskable hardware interrupts
Non-maskable software/hardware interrupts
PCH
Reset value = 1
CPU registers
8
8 7
Reset value = XXh
Reset value = XXh
Reset value = XXh
7
7
7
7
1
7
1 1 X 1 X X
1 I1 H I0 N Z
Figure 9
PCL
are not present in the memory mapping and are
0
0
0
0
0
C
X
0
Accumulator
X index register
Y index register
Program counter
Condition code register
Stack pointer
Central processing unit (CPU)
X = undefined value
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