W741E20X Datasheet, PDF (22/84 Pages) Winbond – 4-BIT FLASH MICROCONTROLLER

Preliminary W741E20X
Bit 0 is reserved.
Bit 1 (BUSYI): Serial port input busy flag.
Bit 2 is reserved.
Bit 3 (BUSYO): Serial port output busy flag.
MFP Output Pin (MFP)
The MFP output pin can output the Timer 1 clock or the modulation frequency; the output of the pin is
determined by mode register 1 (MR1). The organization of MR1 is shown in Figure 6. When bit 2 of
MR1 is reset to "0," the MFP output can deliver a modulation output in any combination of one signal
from among DC, 4096Hz, 2048Hz, and one or more signals from among 128 Hz, 64 Hz, 8 Hz, 4 Hz, 2
Hz, or 1 Hz (when using a 32.768 KHz crystal). The MOV MFP, #I instruction is used to specify the
modulation output combination. The data specified by the 8-bit operand and the MFP output pin are
shown as below.
(Fosc = 32.768 KHz)
R7 R6
R5
R4
R3
R2
R1
R0 FUNCTION
0
0
0
0
0
0 Low level
0
0
0
0
0
1 128 Hz
0
0
0
0
1
0 64 Hz
00
0
0
0
1
0
0 8 Hz
0
0
1
0
0
0 4 Hz
0
1
0
0
0
0 2 Hz
1
0
0
0
0
0 1 Hz
0
0
0
0
0
0 High level
0
0
0
0
0
1 128 Hz
0
0
0
0
1
0 64 Hz
01
0
0
0
1
0
0 8 Hz
0
0
1
0
0
0 4 Hz
0
1
0
0
0
0 2 Hz
1
0
0
0
0
0 1 Hz
0
0
0
0
0
0 2048 Hz
0
0
0
0
0
1 2048 Hz * 128 Hz
0
0
0
0
1
0 2048 Hz * 64 Hz
10
0
0
0
1
0
0 2048 Hz * 8 Hz
0
0
1
0
0
0 2048 Hz * 4 Hz
0
1
0
0
0
0 2048 Hz * 2 Hz
1
0
0
0
0
0 2048 Hz * 1 Hz
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