ST72F621L4M1 STMicroelectronics, ST72F621L4M1 Datasheet - Page 98

• Manufacturer Part Number: ST72F621L4M1
• Description: IC MCU 8BIT LS 16K 34-SOIC
• Manufacturer: STMicroelectronics
• Series: ST7r

Specifications of ST72F621L4M1

• Core Processor: ST7
• Core Size: 8-Bit
• Speed: 8MHz
• Connectivity: SCI, SPI, USB
• Peripherals: DMA, LVD, POR, PWM, WDT
• Number Of I /o: 23
• Program Memory Size: 16KB (16K x 8)
• Program Memory Type: FLASH
• Ram Size: 768 x 8
• Voltage - Supply (vcc/vdd): 4 V ~ 5.5 V
• Data Converters: A/D 8x10b
• Oscillator Type: Internal
• Operating Temperature: 0°C ~ 70°C
• Package / Case: 34-SOIC (7.5mm Width)
• Processor Series: ST72F6x
• Core: ST7
• Data Bus Width: 8 bit
• Data Ram Size: 768 B
• Interface Type: SCI, SPI, USB
• Maximum Clock Frequency: 12 MHz
• Number Of Programmable I/os: 23
• Number Of Timers: 2
• Operating Supply Voltage: 4 V to 5.5 V
• Maximum Operating Temperature: + 70 C
• Mounting Style: SMD/SMT
• Minimum Operating Temperature: 0 C
• On-chip Adc: 10 bit
• For Use With: 497-5046 - KIT TOOL FOR ST7/UPSD/STR7 MCU
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Lead Free Status / Rohs Status: In Transition
• Other names: 497-2112-5

INSTRUCTION SET OVERVIEW (Cont’d)
11.2 INSTRUCTION GROUPS
The ST7 family devices use an Instruction Set
consisting of 63 instructions. The instructions may
Using a prebyte
The instructions are described with one to four op-
codes.
In order to extend the number of available op-
codes for an 8-bit CPU (256 opcodes), three differ-
ent prebyte opcodes are defined. These prebytes
modify the meaning of the instruction they pre-
cede.
The whole instruction becomes:
to the number of bytes required to compute the ef-
fective address
98/139
Load and Transfer
Stack operation
Increment/Decrement
Compare and Tests
Logical operations
Bit Operation
Conditional Bit Test and Branch
Arithmetic operations
Shift and Rotates
Unconditional Jump or Call
Conditional Branch
Interruption management
Condition Code Flag modification
PC-2
PC-1
PC
PC+1
End of previous instruction
Prebyte
Opcode
Additional word (0 to 2) according
LD
PUSH
INC
CP
AND
BSET
BTJT
ADC
SLL
JRA
JRxx
TRAP
SIM
CLR
POP
DEC
TNZ
OR
BRES
BTJF
ADD
SRL
JRT
WFI
RIM
Doc ID 6996 Rev 5
be subdivided into 13 main groups as illustrated in
the following table:
These prebytes enable instruction in Y as well as
indirect addressing modes to be implemented.
They precede the opcode of the instruction in X or
the instruction using direct addressing mode. The
prebytes are:
using immediate, direct, indexed, or inherent ad-
dressing mode by a Y one.
rect, direct bit, or direct relative addressing mode
to an instruction using the corresponding indirect
addressing mode.
It also changes an instruction using X indexed ad-
dressing mode to an instruction using indirect X in-
dexed addressing mode.
direct indexed addressing mode by a Y one.
PDY 90
PIX 92
PIY 91
RSP
BCP
XOR
SRA
JRF
HALT
SCF
SUB
CPL
SBC
RLC
JP
IRET
RCF
Replace an X based instruction
Replace an instruction using di-
Replace an instruction using X in-
NEG
MUL
RRC
CALL
SWAP
CALLR
SLA
NOP
RET