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參數(shù)資料
| 型號： | GMS81524B |
| 廠商： | Hynix Semiconductor Inc. |
| 元件分類： | 8位微控制器 |
| 英文描述： | 8-BIT SINGLE-CHIP MICROCONTROLLERS |
| 中文描述： | 8位單晶片微控制器 |
| 文件頁數(shù)： | 61/110頁 |
| 文件大?。?/td> | 1980K |
| 代理商： | GMS81524B |
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GMS81508B/16B/24B, GMS82512/16/24
58
MAY. 2001 Ver 2.0
15. BUZZER FUNCTION
The buzzer driver block consists of 6-bit binary counter,
buzzer register, and clock source selector. It generates
square-wave which has very wide range frequency (500Hz
~ 250kHz at f
XIN
= 8MHz) by user software.
A 50% duty pulse can be output to R55/BUZ pin to use for
piezo-electric buzzer drive
. Pin R55 is assigned for output port
of Buzzer driver by setting the bit 5 of PMR5 (address D1
H
) to
“1”.
At this time, the pin R55 must be defined as output
mode (the bit 5 of R5DD=1).
Example: 2.4kHz output at 8MHz.
LDM
LDM
R5DD,#XX1X_XXXXB
BUR,#9AH
LDM
PMR5,#XX1X_XXXXB
X means don’t care
The bit 0 to 5 of BUR determines output frequency for
buzzer driving.
Equation of frequency calculation is shown below.
f
BUZ
: Buzzer frequency
f
XIN
: Oscillator frequency
Divide Ratio: Prescaler divide ratio by BUCK[1:0]
BUR: Lower 6-bit value of BUR. Buzzer period value.
The frequency of output signal is controlled by the buzzer
control register BUR.The bit 0 to bit 5 of BUR determine
output frequency for buzzer driving.
Figure 15-1 Block Diagram of Buzzer Driver
Figure 15-2 PMR5 and Buzzer Register
f
BUZ
f
2
DivideRatio
BUR
×
×
-------------------------------------------------------------
=
P
÷
16
÷
64
÷
32
÷
128
BUR
R55/BUZ PIN
PMR5
Internal bus line
R55 port data
XIN PIN
6-bit binary
2
6
[0EC
H
]
[0D1
H
]
0
1
F/F
÷
2
Comparator
Compare data
6-BIT COUNTER
MUX
00
01
10
11
Port selection
BUR[5:0]
Buzzer Period Data
BUR
ADDRESS: 0EC
RESET VALUE: Undefined
W
W
W
W
W
W
Source clock select
00:
÷
16
01:
÷
32
10:
÷
64
11:
÷
128
R55/BUZ Selection
0: R55 port (Turn off buzzer)
1: BUZ port (Turn on buzzer)
PMR5
ADDRESS: 0D1
RESET VALUE: --00 ----
B
W
-
-
W
W
-
-
-
-
W
R54/WDTO Selection
0: R54
1: WDTO (Output)
BUCK1BUCK0
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相關(guān)代理商/技術(shù)參數(shù) |
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| GMS81524BK | 制造商:HYNIX 制造商全稱:Hynix Semiconductor 功能描述:8-BIT SINGLE-CHIP MICROCONTROLLERS |
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| GMS81524BQ | 制造商:HYNIX 制造商全稱:Hynix Semiconductor 功能描述:HYUNDAI MICRO ELECTRONICS 8-BIT SINGLE-CHIP MICROCONTROLLERS |
| GMS81524BT | 制造商:HYNIX 制造商全稱:Hynix Semiconductor 功能描述:[General Purpose(1) : ADC/ LED/ SCI/ PWM] |
| GMS81524BTK | 制造商:HYNIX 制造商全稱:Hynix Semiconductor 功能描述:8-BIT SINGLE-CHIP MICROCONTROLLERS |
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