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參數(shù)資料
| 型號(hào)： | H66T68BA |
| 英文描述： | 64-Note ROM memory Dynamic speaker can be driven with external NPN transistor |
| 中文描述： | 64 - ROM內(nèi)存注意動(dòng)態(tài)揚(yáng)聲器，可以與外部NPN晶體管驅(qū)動(dòng) |
| 文件頁(yè)數(shù)： | 2/4頁(yè) |
| 文件大?。?/td> | 46K |
| 代理商： | H66T68BA |
HI-SINCERITY
MICROELECTRONICS CORP.
Spec. No. : HA200220
Issued Date : 1998.04.08
Revised Date : 2002.12.20
Page No. : 2/4
H66T19XA, H66T32XA, H66T68XA
HSMC Product Specification
Comment
Stress above those listed as "Absolute Maximum Ratings" may cause permanent damage to the device.
These are stress ratings only. Functions of this device at these or any other conditions above those
indicated in the operational sections of this specification is not implied. Any expos-ure to absolute
maximum rating conditions for extended periods may affect device reliability.
Electrical Characteristics
(VSS=0V, Ta=25
°
C, FOSC=65536Hz, unless otherwise specified)
Paramater
Symbol
V
DD
I
D
I
Drive
I
Sink
F/F
F/F
Min
1.5V
-
-
-
-12%
10%
Typ
-
-
-
-
-
-
Max
3V
20uA
200uA
5uA
+33%
-
Conditions
Operating Voltage
Operating Current
Drive Current
O/P Sink Current
Frequency Deviation Per Lot
Frequency Stability
V
DD
=1.5V, O/P Open
V
DD
=1.3V, O/P=0.8V
V
DD
=1.3V, O/P=0.5V Open
V
DD
=1.5V
(F
OSC(1.6V)
-F
OSC (1.3V)
)/F
OSC(1.3V)
Functional Description
Oscillator Circuit
The oscillation frequency is used for tone and beat generators. Its accuracy affects the quality of the
music.
Tone Generator
Tone frequencies are oscillator frequencies-M, where M is any even number from 64 to 256. Within a
melody 14 scales can be selected including PAUSE code and END code. The tone generator is a
programmed divider. The range of scales is from "C4" to "C6" and that for freq-uency varies from
258Hz to 23768Hz.
Rhythm Generator
The rhythm generator is also a programmed divider. It contains 15 available rhythms as follows:
1/4
1/2
3/4
1-1/4
1-1/2
1-3/4
2-1/4
2-1/2
2-3/4
3-1/4
3-1/2
3-3/4
Melody Rom
The Mask ROM can memorize 64 notes with 6 bits. 4 bits are used for controlling the scale co-de and
2 bits are used for controlling the rhythm code.
Tempo Generator
There are 15 available tempos in the H66T19/32/68 Series. The 15 tempos are: 128, 137, 148, 160,
175, 192, 213, 240, 274, 320, 480, 640, 960, 1920 J / minute.
1
2
3
J. Four rhythms can be selected from these.
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