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HT45F43 Datasheet(PDF) 124 Page - Holtek Semiconductor Inc

Part # HT45F43
Description  8-Bit Flash MCU with Op Amps & Comparators
PDF  152 Pages
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Manufacturer  HOLTEK [Holtek Semiconductor Inc]
Direct Link  http://www.holtek.com
Logo HOLTEK - Holtek Semiconductor Inc

HT45F43 Datasheet(HTML) 124 Page - Holtek Semiconductor Inc

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If the BPCTL options have selected both pins PA6 and PA7 to function as a BZ and BZ complementary
pair of buzzer outputs, then for correct buzzer operation it is essential that both pins must be setup as
outputs by setting bits PAC6 and PAC7 of the PAC port control register to zero. The PA6 data bit in the
PA data register must also be set high to enable the buzzer outputs, if set low, both pins PA6 and PA7
will remain low. In this way the single bit PA6 of the PA register can be used as an on/off control for
both the BZ and BZ buzzer pin outputs. Note that the PA7 data bit in the PA register has no control over
the BZ buzzer pin PA7.
BPCTL Register
Bit
76543210
Name
PMODE
PWM0EN
PWM1EN
BC1
BC0
BZ2
BZ1
BZ0
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
POR
00000000
Bit 7~5
PWM control bits
Bit 4~3
BC1, BC0: Buzzer or I/O
00: PA7, PA6
01: PA7, BZ
10: reserved
11: BZB,BZ
Bit 2~0
BZ2~BZ0: Buzzer output frequency selection
000: fTB/2
2
001: fTB/2
3
010: fTB/2
4
011: fTB/2
5
100: fTB/2
6
101: fTB/2
7
110: fTB/2
8
111: fTB/2
9
PA6/PA7 Pin Function Control
PAC Register
PAC6
PAC Register
PAC7
PA Data Register
PA6
PA Data Register
PA7
Output
Function
001
x
PA6=BZ
PA7=BZ
000
x
PA6=
²0²
PA7=
²0²
011
x
PA6=BZ
PA7=input line
010
x
PA6=
²0²
PA7=input line
10
x
D
PA6=input line
PA7=D
11
x
x
PA6=input line
PA7=input line
²x
² stands for don¢t care
²D² stands for Data ²0² or ²1²
Rev. 1.20
124
September 15, 2011
HT45F23/HT45F43
8-Bit Flash MCU with Op Amps & Comparators



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