UPSD3422E-40U6 STMicroelectronics, UPSD3422E-40U6 Datasheet - Page 58

• Manufacturer Part Number: UPSD3422E-40U6
• Description: MCU 8BIT 8032 64KB FLASH 80TQFP
• Manufacturer: STMicroelectronics
• Series: µPSDr

Specifications of UPSD3422E-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: 80KB (80K x 8)
• Program Memory Type: FLASH
• Ram Size: 4K 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: 497-5577 - BOARD EVAL USB POWER SWITCH497-5518 - EVAL BOARD RFID READER
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Other names: 497-4903

Dual data pointers
11.2
11.2.1
58/300
Data pointer mode register, DPTM (86h)
The two “background” data pointers, DPTR0 and DPTR1, can be configured to
automatically increment, decrement, or stay the same after a MOVX instruction accesses
the DPTR register. Only the currently selected pointer will be affected by the increment or
decrement. This feature is controlled by the DPTM register defined in
The automatic increment or decrement function is effective only for the MOVX instruction,
and not MOVC or any other instruction that uses the DTPR register.
Firmware example
The 8051 assembly code illustrated in
from one XDATA address region to another XDATA address region. Auto-address
incrementing and auto-pointer toggling will be used.
Table 15.
Table 16.
Bit 7
7-4
3-2
1-0
Bit
–
MD[11:10]
MD[01:00]
DPTM: data pointer mode register (SFR 86h, reset value 00h)
DPTM register bit definition
Symbol
Bit 6
–
–
Bit 5
R/W
R,W
R,W
–
–
DPTR1 mode bits
DPTR0 mode bits
00: DPTR1 No change
01: Reserved
10: Auto Increment
11: Auto Decrement
00: DPTR0 No change
01: Reserved
10: Auto Increment
11: Auto Decrement
Bit 4
Table
–
UPSD3422, UPSD3433, UPSD3434, UPSD3454
shows how to transfer a block of data bytes
MD11
Bit 3
Definition
Reserved
MD10
Bit 2
Table
MD01
Bit 1
15.
MD00
Bit 0