參數(shù)資料
型號: UPD753304P
廠商: NEC Corp.
元件分類: 4位微控制器
英文描述: 4-BIT SINGLE-CHIP MICROCONTROLLER FOR SMALL GENERAL-PURPOSE INFRARED REMOTE CONTROL TRANSMITTER
中文描述: 4位單片機的小型通用紅外遙控器
文件頁數(shù): 19/56頁
文件大?。?/td> 374K
代理商: UPD753304P
19
μ
PD753304
Figure 6-1. Clock Generator Block Diagram
Note
Instruction execution
Remarks 1.
f
CC
= Main system clock frequency
f
XT
= Subsystem clock frequency
Φ
= CPU clock
PCC: Processor Clock Control Register
SCC: System Clock Control Register
One clock cycle (t
CY
) of the CPU clock is equal to one machine cycle of the instruction.
2.
3.
4.
5.
6.
CL1
CL2
f
CC
f
CT
Subsystem
clock oscillator
(with RC oscil-
lation, resistor
and capacitor)
Main system
clock oscillator
(with RC
oscillation and
capacitor)
4
HALT
Note
STOP
Note
WM.3
SOS
SCC3
SOS3
SCC0
PCC0
PCC1
PCC2
PCC3
PCC2,
PCC3
Clear
STOP F/F
Q
S
R
Oscil-
lation
stop
Oscil-
lation
stop
HALT F/F
S
R
Wait release signal from BT
RESET signal
Standby release signal from
interrupt control circuit
· CPU
· Clock output circuit
Φ
1/4
Divider
1/1 to 1/4096
Divider
1/2 1/41/16
· Basic interval timer (BT)
· Timer counter
· Watch timer
· LCD controller/driver
· Clock output circuit
· Timer counter
· LCD controller/driver
· Watch timer
PCC
Q
Selector
Selector
I
SCC
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