EVAL-ADUC831QSZ Analog Devices Inc, EVAL-ADUC831QSZ Datasheet - Page 16

• Manufacturer Part Number: EVAL-ADUC831QSZ
• Description: KIT DEV FOR ADUC831 QUICK START
• Manufacturer: Analog Devices Inc
• Series: QuickStart™ Kitr
• Type: MCUr

Specifications of EVAL-ADUC831QSZ

• Contents: Evaluation Board, Power Supply, Cable, Software and Documentation
• Silicon Manufacturer: Analog Devices
• Core Architecture: 8051
• Silicon Core Number: ADuC831
• Tool / Board Applications: General Purpose MCU, MPU, DSP, DSC
• Mcu Supported Families: ADUC8xx
• Development Tool Type: Hardware - Eval/Demo Board
• Rohs Compliant: Yes
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With/related Products: ADuC831
• Lead Free Status / Rohs Status: Compliant
• Other names: EVAL-ADUC831QS; EVAL-ADUC831QS

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
Bit
7
6
5
4
3
2
1
0
Table I. PSW SFR Bit Designations
Name
CY
AC
F0
RS1
RS0
OV
F1
P
Description
Carry Flag
Auxiliary Carry Flag
General-Purpose Flag
Register Bank Select Bits
RS1
0
0
1
1
Overflow Flag
General-Purpose Flag
Parity Bit
D0H
00H
Yes
RS0
0
1
0
1
Selected Bank
0
1
2
3
–16–
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
Bit
7
6
5
4
3
2
1
0
Name
SMOD
SERIPD
INT0PD
ALEOFF
GF1
GF0
PD
IDL
Table II. PCON SFR Bit Designations
Description
Double UART Baud Rate
I
INT0 Power-Down Interrupt Enable
Disable ALE Output
General-Purpose Flag Bit
General-Purpose Flag Bit
Power-Down Mode Enable
Idle Mode Enable
2
C/SPI Power-Down Interrupt Enable
87H
00H
No
REV. 0