UPSD3433E-40T6 STMicroelectronics, UPSD3433E-40T6 Datasheet - Page 50

• Manufacturer Part Number: UPSD3433E-40T6
• Description: MCU 8BIT 8032 128KB FLASH 52TQFP
• Manufacturer: STMicroelectronics
• Series: µPSDr

Specifications of UPSD3433E-40T6

• Core Processor: 8032
• Core Size: 8-Bit
• Speed: 40MHz
• Connectivity: I²C, IrDA, SPI, UART/USART, USB
• Peripherals: LVD, POR, PWM, WDT
• Number Of I /o: 35
• Program Memory Size: 160KB (160K x 8)
• Program Memory Type: FLASH
• Ram Size: 8K x 8
• Voltage - Supply (vcc/vdd): 3 V ~ 5.5 V
• Data Converters: A/D 8x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 52-TQFP, 52-VQFP
• For Use With: 497-5518 - EVAL BOARD RFID READER
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Other names: 497-4906

8032 addressing modes
9.7
9.8
9.9
9.10
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Indexed addressing
This mode is used for the MOVC instruction which allows the 8032 to read a constant from
program memory (not data memory). MOVC is often used to read look-up tables that are
embedded in program memory. The final address produced by this mode is the result of
adding either the 16-bit PC or DPTR value to the contents of the accumulator. The value in
the accumulator is referred to as an index. The data fetched from the final location in
program memory is stored into the accumulator, overwriting the index value that was
previously stored there. For example:
MOVC A, @A+DPTR
MOVC A, @A+PC
Relative addressing
This mode will add the two’s-compliment number stored in the second byte of the instruction
to the program counter for short jumps within +128 or –127 addresses relative to the
program counter. This is commonly used for looping and is very efficient since no additional
bus cycle is needed to fetch the jump destination address. For example:
SJMP 34h
Absolute addressing
This mode will append the 5 high-order bits of the address of the next instruction to the 11
low-order bits of an ACALL or AJUMP instruction to produce a 16-bit jump address. The
jump will be within the same 2 Kbyte page of program memory as the first byte of the
following instruction. For example:
AJMP 0500h
Long addressing
This mode will use the 16-bits contained in the two bytes following the instruction byte as a
jump destination address for LCALL and LJMP instructions. For example:
LJMP 0500h
; Jump 34h bytes ahead (in program
; memory) of the address at which
; the SJMP instruction is stored. If
; SJMP is at 1000h, program
; execution jumps to 1034h.
; If next instruction is located at
; address 4000h, the resulting jump
; will be made to 4500h.
; Unconditionally jump to address
; 0500h in program memory
; Move code byte relative to
; DPTR into accumulator
; Move code byte relative to PC
; into accumulator
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