ST7232AK2-Auto STMicroelectronics, ST7232AK2-Auto Datasheet - Page 144

• Manufacturer Part Number: ST7232AK2-Auto
• Description: 8-bit MCU for automotive, 16 Kbyte Flash, 10-bit ADC, 4 timers, SPI, SCI
• Manufacturer: STMicroelectronics

Specifications of ST7232AK2-Auto

• Hdflash Endurance: 100 cycles, data retention
• Clock Sources: crystal/ceramic resonator oscillators and bypass for external clock
• Four Power Saving Modes: halt, active halt, wait and slow
• Main Clock Controller With: real time base, beep and clock-out capabilities
• Two 16-bit Timers With: 2 input captures, 2 output compares, PWM and pulse generator modes

Instruction set
11
11.1
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Instruction set
CPU addressing modes
The CPU features 17 different addressing modes which can be classified in 7 main groups
(see
Table 60.
The CPU instruction set is designed to minimize the number of bytes required per
instruction. To do so, most of the addressing modes may be subdivided in two sub-modes
called long and short:
●
●
The ST7 assembler optimizes the use of long and short addressing modes.
Addressing mode
Inherent
Immediate
Direct
Indexed
Indirect
Relative
Bit operation
Long addressing mode is more powerful because it can use the full 64 Kbyte address
space, however it uses more bytes and more CPU cycles.
Short addressing mode is less powerful because it can generally only access page
zero (0000h - 00FFh range), but the instruction size is more compact, and faster. All
memory to memory instructions use short addressing modes only (CLR, CPL, NEG,
BSET, BRES, BTJT, BTJF, INC, DEC, RLC, RRC, SLL, SRL, SRA, SWAP)
Table
60).
CPU addressing mode groups
Example
nop
ld A,#$55
ld A,$55
ld A,($55,X)
ld A,([$55],X)
jrne loop
bset byte,#5
ST7232Axx-Auto