W925EP01 Datasheet, PDF (19/108 Pages) Winbond – 8-BIT CID MICROCONTROLLER

W925EP01/ W925EP01FG
T0S1 (T1S1) T0S0 (T1S0)
0
0
0
1
1
0
1
1
DIVS:
Divider clock source control bit 1:
DIVS = 0: Fs/2¹³
DIVS= 1: Fs/2¹⁴
M /S: System clock source control bit:
M /S = 0: Fosc = XIN1 (FM)
M /S = 1: Fosc = XIN2 (Fs)
Pre-scale clock source
Fosc/2²
Fosc/2⁶
Fosc/2¹⁰
Fs
CLOCK CONTROL2
(initial=00H)
Bit:
7
6
5
4
3
2
1
0
ENBUZ BUZSL KT1 KT0
-
-
-
-
Mnemonic: CKCON2
Address: 8Fh
ENBUZ: When ENBUZ=1 the BUZ pin works as buzzer output, otherwise BUZ pin is in floating state.
BUZSL: Buzzer output selection. When BUZSL=0 BUZ is the output of octave tone. When BUZZL=1,
BUZ is the output of key tone.
KT1-0: Key tone frequency sources from divider. When divider is enabled, KT1 and KT0 determine
the key tone frequency.
KT1
KT0
KEY TONE FREQUENCY
0
0
Low
0
1
512Hz
1
0
1024Hz
1
1
2048Hz
PORT 1
(initial=FFH)
Bit: 7
6
P1.7 P1.6
5
P1.5
4
P1.4
3
P1.3
2
P1.2
1
P1.1
0
P1.0
Mnemonic: P1
Address: 90h
P1.7-0: P1 can be selected as input or output mode by the P1IO register, at initial reset, P1IO is set to
1, so P1 is used as input mode. When P1IO is set to 0, the P1 is used as CMOS output mode.
When P1EF are set and P1IO are set as input mode P1 can be used as external interrupt
source. The functions are listed below.
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Publication Release Date: Apr. 10, 2006
Revision A2