UPSD3234A-40U6T STMicroelectronics, UPSD3234A-40U6T Datasheet - Page 17

• Manufacturer Part Number: UPSD3234A-40U6T
• Description: IC MCU 8032 64KB FLASH 80TQFP
• Manufacturer: STMicroelectronics
• Series: µPSDr

Specifications of UPSD3234A-40U6T

• Core Processor: 8032
• Core Size: 8-Bit
• Speed: 40MHz
• Connectivity: I²C, UART/USART, USB
• Peripherals: LVR, POR, PWM, WDT
• Number Of I /o: 46
• Program Memory Size: 288KB (288K x 8)
• Program Memory Type: FLASH
• Ram Size: 8K x 8
• Voltage - Supply (vcc/vdd): 4.5 V ~ 5.5 V
• Data Converters: A/D 4x8b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 80-TQFP, 80-VQFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -

UPSD3234A, UPSD3234BV, UPSD3233B, UPSD3233BV
2.2.1
2.2.2
2.2.3
Figure 5.
Accumulator
The Accumulator is the 8-bit general purpose register, used for data operation such as
transfer, temporary saving, and conditional tests. The Accumulator can be used as a 16-bit
register with B Register as shown below.
Figure 6.
B register
The B Register is the 8-bit general purpose register, used for an arithmetic operation such
as multiply, division with Accumulator.
Stack pointer
The Stack Pointer Register is 8 bits wide. It is incremented before data is stored during
PUSH and CALL executions. While the stack may reside anywhere in on-chip RAM, the
Stack Pointer is initialized to 07h after reset. This causes the stack to begin at location 08h.
Figure 7.
8032 MCU registers
Configuration of BA 16-bit registers
Stack pointer
Two 8-bit Registers can be used as a "BA" 16-bit Registers
SP (Stack Pointer) could be in 00h-FFh
DPTR(DPH)
Bit 15
PCH
B
A
Hardware Fixed
Stack Area (30h-FFh)
00h
DPTR(DPL)
R0-R7
PSW
PCL
Bit 8 Bit 7
SP
A
B
B
Accumulator
B Register
Stack Pointer
Program Counter
Program Status Word
General Purpose
Register (Bank0-3)
Data Pointer Register
SP
00h-FFh
Bit 0
AI06638
A
AI06636
AI06637
Architecture overview
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