參數(shù)資料
型號: ADUC831BS
廠商: ANALOG DEVICES INC
元件分類: 微控制器/微處理器
英文描述: MicroConverter, 12-Bit ADCs and DACs with Embedded 62 kBytes Flash MCU
中文描述: 8-BIT, FLASH, 16.78 MHz, MICROCONTROLLER, PQFP52
封裝: PLASTIC, MQFP-52
文件頁數(shù): 16/76頁
文件大?。?/td> 1211K
代理商: ADUC831BS
REV. 0
–16–
ADuC831
Data Pointer (DPTR)
The Data Pointer is made up of three 8-bit registers, named
DPP (page byte), DPH (high byte) and DPL (low byte). These
are used to provide memory addresses for internal and external
code access and external data access. It may be manipulated as
a 16-bit register (DPTR = DPH, DPL), although INC DPTR
instructions will automatically carry over to DPP, or as three
independent 8-bit registers (DPP, DPH, DPL).
The ADuC831 supports dual data pointers. Refer to the Dual
Data Pointer section.
Program Status Word (PSW)
The PSW SFR contains several bits reflecting the current status
of the CPU as detailed in Table I.
SFR Address
Power-On Default Value
Bit Addressable
D0H
00H
Yes
Table I. PSW SFR Bit Designations
Bit
Name
Description
7
6
5
4
3
CY
AC
F0
RS1
RS0
Carry Flag
Auxiliary Carry Flag
General-Purpose Flag
Register Bank Select Bits
RS1
RS0
0
0
0
1
1
0
1
1
Overflow Flag
General-Purpose Flag
Parity Bit
Selected Bank
0
1
2
3
2
1
0
OV
F1
P
Power Control SFR (PCON)
The PCON SFR contains bits for power-saving options and
general-purpose status flags as shown in Table II.
SFR Address
Power-On Default Value
Bit Addressable
87H
00H
No
Table II. PCON SFR Bit Designations
Bit
Name
Description
7
6
5
4
3
2
1
0
SMOD
SERIPD
INT0PD
ALEOFF
GF1
GF0
PD
IDL
Double UART Baud Rate
I
2
C/SPI Power-Down Interrupt Enable
INT0
Power-Down Interrupt Enable
Disable ALE Output
General-Purpose Flag Bit
General-Purpose Flag Bit
Power-Down Mode Enable
Idle Mode Enable
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