W925E625 Datasheet, PDF (14/75 Pages) Winbond – 8-bit CID MICROCONTROLLER

W925E/C625
DPL1:
This is the low byte of the new additional 16-bit data pointer. That has been added to the
W925E/C625. The user can switch between DPL, DPH and DPL1, DPH1 simply by setting
register DPS.0 = 1. The instructions that use DPTR will now access DPL1 and DPH1 in
place of DPL and DPH. If they are not required, they can be used as conventional register
locations by the user.
DATA POINTER HIGH1
(initial=00H)
Bit:
7
6
5
4
3
2
1
0
DPH1.7 DPH1.6 DPH1.5 DPH1.4 DPH1.3 DPH1.2 DPH1.1 DPH1.0
Mnemonic: DPH1
Address: 85h
DPH1:
This is the high byte of the new additional 16-bit data pointer. That has been added to the
W925E/C625. The user can switch between DPL, DPH and DPL1, DPH1 simply by setting
register DPS = 1. The instructions that use DPTR will now access DPL1 and DPH1 in place
of DPL and DPH. If they are not required, they can be used as conventional register
locations by the user.
DATA POINTER SELECT
(initial=00H)
Bit:
7
6
5
4
3
2
1
0
-
-
-
-
-
-
-
DPS.0
Mnemonic: DPS
Address: 86h
DPS.0: This bit is used to select either the DPL,DPH pair or the DPL1,DPH1 pair as the active Data
Pointer. When set to 1, DPL1,DPH1 will be selected, otherwise DPL,DPH will be selected.
DPS.1-7:These bits are reserved, but will read 0.
POWER CONTROL
(initial=00H)
Bit:
7
6
5
4
3
2
1
0
-
-
-
IDLT GF1 GF0
PD
IDL
IDLT:
GF1-0:
PD:
IDL:
Mnemonic: PCON
Address: 87h
This bit controls the idle mode type. In idle mode when idle mode is released by any
interrupt, if IDLT=1 it will not jump to the corresponding interrupt; if IDLT=0 it will jump to the
corresponding interrupt.
These two bits are general-purpose user flags.
Setting this bit causes the W925E/C625 to go into the POWER DOWN mode. In this mode,
all the clocks are stopped and program execution is frozen. Power down mode can be
released by INT0~INT3 and ring detection of CID interrupt.
Setting this bit causes the W925E/C625 to go into the IDLE mode. The type of idle mode is
selected by IDLT. In this mode the clocks to the CPU are stopped, so program execution is
frozen. However, the clock path to the timers blocks and interrupt blocks is not stopped, and
these blocks continue operating.
- 14 -