W925E240 Datasheet, PDF (26/73 Pages) Winbond – 8-BIT CID MICROCONTROLLER

W925E/C240
CAS TONE PRESENT TIME REGISTER
(initial = 0FH)
Bit:
7
6
5
4
3
2
1
0
CASPT7 CASPT6 CASPT5 CASPT4 CASPT3 CASPT2 CASPT1 CASPT0
Mnemonic: CASPT
Address: BEh
The clock period of guard-time timer is 0.8582mS. The default alert tone present time is 12.87mS.
CASPT7-0: The pre-set data register for counting CAS tone present time. When CAS tone is detected
(ALGR low to high), the guard timer starts to up-count from 00H. As the guard timer is
equal to the value of CASPT, the exist of the CAS tone is accepted. ALGR changes to
low state to stop and reset the counter.
CAS TONE ABSENT TIME REGISTER
(initial = 0FH)
Bit:
7
6
5
4
3
2
1
0
CASAT7 CASAT6 CASAT5 CASAT4 CASAT3 CASAT2 CASAT1 CASAT0
Mnemonic: CASAT
Address: BFh
The clock period of guard-time timer is 0.8582mS. The default alert tone absent time is 12.87mS.
CASAT7-0: The pre-set data register for counting CAS tone absent time. When CAS tone is absent
(ALGR high to low), the guard timer starts to up-count from 00H. As the guard timer is
equal to the value of CASAT, the finish of CAS tone is recognized. ALGR changes to high
state to stop and reset the counter.
SERIAL PORT CONTROL
(initial = 00H)
Bit:
7
SF1
6
5
4
3
2
1
0
-
REGON REN1
SFQ
SEDG CLKIO
SIO
Mnemonic: SCON1
Address: C0h
SF1: Serial port interrupt flag. When 8-bits data transited completely, SF1 is set by hardware. SF1 is
cleared when serial interrupt routine is executed or cleared by software.
REGON: Regulator on/off control. 0 to disable regulator, 1 to regulator.
REN1: Set REN1 from 0 to 1 to start the serial port to receive 8-bit serial data.
SFQ: SFQ = 0 Serial clock output frequency is equal to f_OSC /2
SFQ = 1 Serial clock output frequency is equal to f_OSC /256
SEDG: SEDG = 0 Serial data latched at falling edge of clock, SCLK = Low initially.
SEDG = 1 Serial data latched at rising edge of clock, SCLK = High initially.
CLKIO: CLKIO = 0 P4.0(SCLK) work as output mode
CLKIO = 1 P4.0(SCLK) work as input mode
SIO: SIO = 0 P4.0 & P4.1 work as normal I/O pin
SIO = 1 P4.0 & P4.1 work as Serial port1 function
- 26 -