UPSD3454E-40U6 STMicroelectronics, UPSD3454E-40U6 Datasheet - Page 39
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UPSD3454E-40U6
Manufacturer Part Number
UPSD3454E-40U6
Description
MCU 8BIT 8032 256K FLASH 80-TQFP
Manufacturer
STMicroelectronics
Series
µPSDr
Datasheet
1.UPSD3422EV-40U6.pdf
(300 pages)
Specifications of UPSD3454E-40U6
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
46
Program Memory Size
288KB (288K x 8)
Program Memory Type
FLASH
Ram Size
32K 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
80-TQFP, 80-VQFP
For Use With
497-5518 - EVAL BOARD RFID READER
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Eeprom Size
-
Available stocks
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Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
UPSD3454E-40U6
Manufacturer:
STMicroelectronics
Quantity:
10 000
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- Download datasheet (3Mb)
UPSD3422, UPSD3433, UPSD3434, UPSD3454
7.4
7.5
7.6
7.7
7.7.1
7.7.2
7.7.3
7.7.4
Accumulator (ACC)
This is an 8-bit general purpose register which holds a source operand and receives the
result of arithmetic operations. The ACC register can also be the source or destination of
logic and data movement operations. For MUL and DIV instructions, ACC is combined with
the B register to hold 16-bit operands. The ACC is referred to as “A” in the MCU instruction
set.
B register (B)
The B register is a general purpose 8-bit register for temporary data storage and also used
as a 16-bit register when concatenated with the ACC register for use with MUL and DIV
instructions.
General purpose registers (R0 - R7)
There are four banks of eight general purpose 8-bit registers (R0 - R7), but only one bank of
eight registers is active at any given time depending on the setting in the PSW word
(described next). R0 - R7 are generally used to assist in manipulating values and moving
data from one memory location to another. These register banks physically reside in the first
32 locations of 8032 internal DATA SRAM, starting at address 00h. At reset, only the first
bank of eight registers is active (addresses 00h to 07h), and the stack begins at address
08h.
Program status word (PSW)
The PSW is an 8-bit register which stores several important bits, or flags, that are set and
cleared by many 8032 instructions, reflecting the current state of the MCU core.
on page 40
Carry flag (CY)
This flag is set when the last arithmetic operation that was executed results in a carry
(addition) or borrow (subtraction). It is cleared by all other arithmetic operations. The CY flag
is also affected by Shift and Rotate Instructions.
Auxiliary carry flag (AC)
This flag is set when the last arithmetic operation that was executed results in a carry into
(addition) or borrow from (subtraction) the high-order nibble. It is cleared by all other
arithmetic operations.
General purpose flag (F0)
This is a bit-addressable, general-purpose flag for use under software control.
Register bank select flags (RS1, RS0)
These bits select which bank of eight registers is used during R0 - R7 register accesses
(see
Table
4)
shows the individual flags.
8032 MCU registers
Figure 11
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