參數(shù)資料
型號： UPD780024AF1-xxx-CN3
廠商： NEC Corp.
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)： 28/96頁
文件大?。?/td> 661K
代理商： UPD780024AF1-XXX-CN3
28
μ
PD780021A, 780022A, 780023A, 780024A, 780021AY, 780022AY, 780023AY, 780024AY
Data Sheet U14042EJ4V0DS
5.4 Clock Output/Buzzer Output Controller
A clock output/buzzer output controller is incorporated.
Clocks with the following frequencies can be output as clock output.
Expanded-specification products of
μ
PD780021A, 780022A, 780023A, 780024A
93.75 kHz/187.5 kHz/375 kHz/750 kHz/1.25 MHz/3 MHz/6 MHz/12 MHz (@12 MHz operation with main
system clock)
32.768 kHz (@32.768 kHz operation with subsystem clock)
μ
PD780021AY, 780022AY, 780023AY, 780024AY, and conventional products of
μ
PD780021A,
780022A, 780023A, 780024A
65.5 kHz/131 kHz/262 kHz/524 kHz/1.05 MHz/2.10 MHz/4.19 MHz/8.38 MHz (@8.38 MHz operation with
main system clock)
32.768 kHz (@32.768 kHz operation with subsystem clock)
Clocks with the following frequencies can be output as buzzer output.
Expanded-specification products of
μ
PD780021A, 780022A, 780023A, 780024A
1.46 kHz/2.93 kHz/5.86 kHz/11.7 kHz (@12 MHz operation with main system clock)
μ
PD780021AY, 780022AY, 780023AY, 780024AY, and conventional products of
μ
PD780021A,
780022A, 780023A, 780024A
1.02 kHz/2.05 kHz/4.10 kHz/8.19 kHz (@8.38 MHz operation with subsystem clock)
Figure 5-7. Block Diagram of Clock Output/Buzzer Output Control Circuit
Prescaler
f
X
f
XT
8
Clock
controller
PCL/P74
BUZ/P75
4
f
X
to f
X
/2
7
f
X
/2
10
to f
X
/2
13
S
BCS0, BCS1
BZOE
CLOE
BZOE
BCS1
BCS0
CLOE
CCS3
CCS2
CCS1
CCS0
Internal bus
Clock output selection register (CKS)
S
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