W925E240 Datasheet, PDF (28/73 Pages) Winbond – 8-BIT CID MICROCONTROLLER

W925E/C240
STATUS REGISTER
(initial=00H)
Bit:
7
6
5
4
3
2
1
0
X2UP
HIP
LIP
X1UP
-
-
-
-
Mnemonic: STATUS
Address: C5h
X2UP:Sub-crystal oscillator warm-up status. When set, this bit indicates the crystal oscillator has
completed the warm-up delay. When X2OFF bit is set, hardware will clear this bit. There are two
options which is selected by option code for warm-up delay, one is 1024 clocks warm-up delay,
other is 65536 clocks warm-up delay.
HIP: High Priority Interrupt Status. When set, it indicates that software is servicing a high priority
interrupt. This bit will be cleared when the program executes the corresponding RETI instruction.
LIP: Low Priority Interrupt Status. When set, it indicates that software is servicing a low priority
interrupt. This bit will be cleared when the program executes the corresponding RETI instruction.
X1UP:Crystal Oscillator Warm-up Status. when set, this bit indicates the crystal oscillator has
completed the 65536 clocks warm-up delay. Each time the crystal oscillator is restarted by exit
from power down mode or the X1OFF bit is set, hardware will clear this bit. This bit is set to 1
after a power-on reset. When this bit is cleared, it prevents software from setting the XT/ RG bit
to enable CPU operation from crystal oscillator. There are two options which is selected by
option code for warm-up delay, one is 4096 clocks warm-up delay, other is 65536 clocks warm-
up delay.
FSK TRANSIMT CONTROL REGISTER
(initial = 00H)
Bit:
7
6
5
4
3
2
1
0
FTE FTM FDS
-
-
-
LO1 LO0
Mnemonic: FSKTC
FTE: FSK transmit Enable; Enable:1, Disable = 0
FTM: FSK signal Standard; Bellcore:1, V.23 = 0
FDS: FSK data sending status
LO0, LO1: FSK transmit level option
FSK Output Level
LO1
LO0
150 mV
0
0
120 mV
0
1
95 mV
1
0
75 mV
1
1
Address: C6h
FSK TRANSMIT DATA BUFFER
(initial = 00H)
Bit:
7
6
5
4
3
2
1
0
FSKTB.7 FSKTB.6 FSKTB.5 FSKTB.4 FSKTB.3 FSKTB.2 FSKTB.1 FSKTB.0
Mnemonic: FSKTB
FSKTB.0:Only this bit will be latched and send out as FSK signal
Address: C7h
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