ST72F63BE1M1 STMicroelectronics, ST72F63BE1M1 Datasheet - Page 31

• Manufacturer Part Number: ST72F63BE1M1
• Description: IC MCU 8BIT 4K FLASH 24-SOIC
• Manufacturer: STMicroelectronics
• Series: ST7r

Specifications of ST72F63BE1M1

• Core Processor: ST7
• Core Size: 8-Bit
• Speed: 8MHz
• Connectivity: I²C, SCI, USB
• Peripherals: DMA, LVD, POR, PWM, WDT
• Number Of I /o: 14
• Program Memory Size: 4KB (4K x 8)
• Program Memory Type: FLASH
• Ram Size: 384 x 8
• Voltage - Supply (vcc/vdd): 4 V ~ 5.5 V
• Oscillator Type: External
• Operating Temperature: 0°C ~ 70°C
• Package / Case: 24-SOIC (7.5mm Width)
• Data Converters: A/D 12x8b
• Processor Series: ST72F6x
• Core: ST7
• Data Bus Width: 8 bit
• Data Ram Size: 384 B
• Interface Type: I2C, SCI
• Maximum Clock Frequency: 8 MHz
• Number Of Programmable I/os: 14
• Number Of Timers: 1
• Maximum Operating Temperature: + 70 C
• Mounting Style: SMD/SMT
• Development Tools By Supplier: ST7MDTU3-EPB/US, ST7MDTULS-EVAL, ST72F63B-SK/RAIS, ST7MDTU3-EMU3, STX-RLINK
• Minimum Operating Temperature: 0 C
• For Use With: 497-5521 - EVAL BOARD LOW SPEED USB
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Lead Free Status / Rohs Status: Details

ST7263Bxx
pointed to by the SP. Then the other registers are stored in the next locations as shown in
Figure
●
●
A subroutine call occupies two locations and an interrupt five locations in the stack area.
Figure 10. Stack manipulation example
Figure 11. CPU registers
@ 0100h
@ 017Fh
RESET VALUE = STACK HIGHER ADDRESS
SP
RESET VALUE = RESET VECTOR @ FFFEh-FFFFh
15
15
When an interrupt is received, the SP is decremented and the context is pushed on the
stack.
On return from interrupt, the SP is incremented and the context is popped from the
stack.
10.
Subroutine
Stack Higher Address = 017Fh
Stack Lower Address = 0100h
RESET VALUE = 1
CALL
PCH
PCL
PCH
SP
8
8 7
RESET VALUE = XXh
RESET VALUE = XXh
RESET VALUE = XXh
7
7
7
1
7
Interrupt
7
Event
PCH
PCL
PCH
PCL
1 1 X 1 X X
1 1 H I
CC
A
X
PCL
SP
Doc ID 7516 Rev 8
N Z
PUSH Y
PCH
PCH
PCL
PCL
0
0
0
0
X
0
0
C
CC
Y
A
X
SP
ACCUMULATOR
X INDEX REGISTER
Y INDEX REGISTER
PROGRAM COUNTER
CONDITION CODE REGISTER
STACK POINTER
POP Y
PCH
PCH
PCL
PCL
CC
A
X
SP
IRET
PCH
PCL
Central processing unit
X = undefined value
SP
or RSP
RET
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