ST72F324J6T6 STMicroelectronics, ST72F324J6T6 Datasheet - Page 28

• Manufacturer Part Number: ST72F324J6T6
• Description: IC MCU 8BIT 32K 44-TQFP
• Manufacturer: STMicroelectronics
• Series: ST7r

Specifications of ST72F324J6T6

• Core Processor: ST7
• Core Size: 8-Bit
• Speed: 8MHz
• Connectivity: SCI, SPI
• Peripherals: LVD, POR, PWM, WDT
• Number Of I /o: 32
• Program Memory Size: 32KB (32K x 8)
• Program Memory Type: FLASH
• Ram Size: 1K x 8
• Voltage - Supply (vcc/vdd): 3.8 V ~ 5.5 V
• Data Converters: A/D 12x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 44-TQFP, 44-VQFP
• Controller Family/series: ST7
• No. Of I/o's: 32
• Ram Memory Size: 1KB
• Cpu Speed: 8MHz
• No. Of Timers: 2
• Embedded Interface Type: SCI, SPI
• No. Of Pwm Channels: 1
• Rohs Compliant: Yes
• Processor Series: ST72F3x
• Core: ST7
• Data Bus Width: 8 bit
• Data Ram Size: 1024 B
• Interface Type: SCI, SPI
• Maximum Clock Frequency: 8 MHz
• Number Of Programmable I/os: 32
• Number Of Timers: 4 bit
• Operating Supply Voltage: 3.8 V to 5.5 V
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• Development Tools By Supplier: ST7F521-IND/USB, ST7232X-EVAL, ST7MDT20-DVP3, ST7MDT20J-EMU3, STX-RLINK
• Minimum Operating Temperature: - 40 C
• On-chip Adc: 10 bit
• Cpu Family: ST7
• Device Core Size: 8b
• Frequency (max): 8MHz
• Total Internal Ram Size: 1KB
• # I/os (max): 32
• Number Of Timers - General Purpose: 2
• Operating Supply Voltage (typ): 5V
• Operating Supply Voltage (max): 5.5V
• Operating Supply Voltage (min): 3.8V
• Instruction Set Architecture: CISC
• Operating Temp Range: -40C to 85C
• Operating Temperature Classification: Industrial
• Mounting: Surface Mount
• Pin Count: 44
• Package Type: TQFP
• For Use With: 497-8222 - UPS (LINE INTERACTIVE - 450W)497-8436 - BOARD EVAL UPS 450W VOUT=220V497-6421 - BOARD EVAL DGTL BATT CHGR DESIGN
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Eeprom Size: -
• Lead Free Status / Rohs Status: In Transition
• Other names: 497-2108

Central processing unit (CPU)
5.3.1
5.3.2
5.3.3
5.3.4
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Accumulator (A)
The Accumulator is an 8-bit general purpose register used to hold operands and the results
of the arithmetic and logic calculations and to manipulate data.
Index registers (X and Y)
These 8-bit registers are used to create effective addresses or as temporary storage areas
for data manipulation. (The Cross-Assembler generates a precede instruction (PRE) to
indicate that the following instruction refers to the Y register.)
The Y register is not affected by the interrupt automatic procedures.
Program counter (PC)
The program counter is a 16-bit register containing the address of the next instruction to be
executed by the CPU. It is made of two 8-bit registers PCL (Program Counter Low which is
the LSB) and PCH (Program Counter High which is the MSB).
Condition Code register (CC)
The 8-bit Condition Code register contains the interrupt masks and four flags representative
of the result of the instruction just executed. This register can also be handled by the PUSH
and POP instructions. These bits can be individually tested and/or controlled by specific
instructions.
Table 6.
CC
BIt Name
4
2
R/W
7
1
H
N
Half carry
Negative
Arithmetic management bits
This bit is set by hardware when a carry occurs between bits 3 and 4 of the ALU
during an ADD or ADC instructions. It is reset by hardware during the same
instructions.
0: No half carry has occurred.
1: A half carry has occurred.
This bit is tested using the JRH or JRNH instruction. The H bit is useful in BCD
arithmetic subroutines.
This bit is set and cleared by hardware. It is representative of the result sign of the last
arithmetic, logical or data manipulation. It is a copy of the result 7th bit.
0: The result of the last operation is positive or null.
1: The result of the last operation is negative (that is, the most significant bit is a logic
1.
This bit is accessed by the JRMI and JRPL instructions.
R/W
6
1
R/W
I1
5
R/W
H
4
Function
R/W
I0
3
R/W
N
2
Reset value: 111x1xxx
R/W
1
Z
ST72324Bxx
R/W
C
0