參數(shù)資料
型號: UPD75402AGB
廠商: NEC Corp.
英文描述: 4 BIT SINGLE-CHIP MICROCOMPUTER
中文描述: 4位單片機(jī)
文件頁數(shù): 15/48頁
文件大小: 515K
代理商: UPD75402AGB
15
μ
PD75402A(A)
5.2 CLOCK GENERATOR
Operation of the clock generator is specified by the processor clock control register (PCC).
The instruction execution time is variable.
0.95
μ
s, 1.91
μ
s, 15.3
μ
s (when f
XX
is 4.19 MHz.)
Fig. 5-1 Block Diagram of the Clock Generator
V
DD
X1
X2
System
clock
oscillator
f
XX
or f
X
Oscillation
stops.
1/16 to 1/512
Frequency divider
1/2 1/16
S
Frequency
divider
HALT flip-
flop
S
R
Q
RESET input rising edge
detection signal
RESET input falling
edge detection signal
Standby release signal
from interrupt control circuit
STOP flip-
flop
Q
S
R
All bits are
cleared.
PCC2 is
cleared.
HALT*
STOP*
PCC0
PCC1
PCC2
PCC3
4
I
PCC
·
Basic interval timer (BT)
·
Clock output circuit
·
Serial interface
·
INT0 noise eliminator
1/4
Φ
· CPU
·
INT0 noise
eliminator
·
Clock output
circuit
Remarks 1.
f
XX
= Crystal/ceramic oscillated frequency
2.
f
X
= External clock frequency
3.
Φ
= CPU clock
4.
An asterisk (*) indicates instruction execution.
5.
PCC: Processor clock control register
6.
One clock cycle (t
CY
) of
Φ
is equal to one machine cycle of an instruction. See AC
characteristics of
Chapter 10
for details of t
CY
.
相關(guān)PDF資料
PDF描述
UPD75402AGBA 4 BIT SINGLE-CHIP MICROCOMPUTER
UPD754302 4-BIT SINGLE-CHIP MICROCONTROLLER FOR SMALL GENERAL-PURPOSE INFRARED REMOTE CONTROL TRANSMITTER
UPD75P108B 4-BIT SINGLE-CHIP MICROCOMPUTER
UPD75P108BCW 4-BIT SINGLE-CHIP MICROCOMPUTER
UPD75P108BDW 4-BIT SINGLE-CHIP MICROCOMPUTER
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
UPD7554AG-597-E2 制造商:Renesas Electronics Corporation 功能描述:
UPD7554AG-597-E2-A 制造商:Renesas Electronics Corporation 功能描述:
UPD7554AG-603-E2 制造商:Renesas Electronics Corporation 功能描述:
UPD7554AG-603-E2-A 制造商:Renesas Electronics Corporation 功能描述:
UPD7554AG-611-E2 制造商:Renesas Electronics Corporation 功能描述: