UPD17073 NEC, UPD17073 Datasheet - Page 155
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UPD17073
Manufacturer Part Number
UPD17073
Description
4-BIT SINGLE-CHIP MICROCONTROLLER WITH HARDWARE FOR DIGITAL TUNING SYSTEM
Manufacturer
NEC
Datasheet
1.UPD17073.pdf
(226 pages)
- Current page: 155 of 226
- Download datasheet (2Mb)
17. BEEP
17.1 Configuration and Function of BEEP
whether 1.5 kHz or 3 kHz is output from the BEEP pin, or whether the BEEP pin is used as a 1-bit general-purpose
output port.
reset
At
Figure 17-1 outlines BEEP.
BEEP outputs a clock of 1.5 kHz or 3 kHz from the BEEP pin.
The output select block selects, by using the BEEP0CK0 and BEEP0CK1 flags of the BEEP clock select register,
The clock generation block generates the 1.5-kHz or 3-kHz clock to be output to the BEEP pin.
Figure 17-2 shows the configuration and function of the BEEP clock select register.
BEEP
clock select
register
Power-ON
Clock stop
CE
Name
BEEP
Figure 17-2. Configuration and Function of BEEP Clock Select Register
b
0
0
3
Flag symbol
b
0
0
2
Retained
b
K
B
E
E
P
C
0
0
1
1
0
1
0
0
1
BEEP0CK0 flag
BEEP0CK1 flag
Output select
block
b
K
B
E
E
P
C
0
1
0
1
0
0
0
0
0
Figure 17-1. Outline of BEEP
Used as general-purpose output port and outputs low level
Used as general-purpose output port and outputs high level
Outputs 1.5 kHz clock
Outputs 3 kHz clock
Fixed to “0”
(BANK1)
Address
5BH
Read/
Write
R/W
Setting of BEEP pin
1.5 kHz
3 kHz
Output select block
Clock generation block
PD17072,17073
155
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