UPD30121 NEC [NEC], UPD30121 Datasheet - Page 34

• Manufacturer Part Number: UPD30121
• Description: VR4121TM 64-/32-BIT MICROPROCESSOR
• Manufacturer: NEC [NEC]

34
HSPSCLK high-level width
HSPSCLK low-level width
HSPSCLK clock frequency
HSPSCLK clock cycle
HSPSCLK clock rise time
HSPSCLK clock fall time
HSPMCLK high-level width
HSPMCLK low-level width
HSPMCLK clock frequency
HSPMCLK clock cycle
FIRCLK clock frequency
FIRCLK clock duty
SCLK high-level width
SCLK low-level width
SCLK jitter
CPU core operating frequency
BUSCLK high-level width
BUSCLK low-level width
(1) Clock parameter (1/2)
Notes 1. Applied to ADD25/SCLK pin.
Remark CLKSEL (2:0): Value set to the TxD/CLKSEL2, RTS#/CLKSEL1, and DTR#/CLKSEL0 pins after reset.
2. Precision tests have not been performed. Only guaranteed as design characteristics.
3. Do not set CLKSEL (2:0) = 111.
4. The settings CLKSEL (2:0) = 110 and 101 are only guaranteed for the 168 MHz model. Do not apply
5. Applied to BUSCLK pin when BSEL bit of BCUCNTREG3 register is 0.
6. Applied to BUSCLK pin when BSEL bit of BCUCNTREG3 register is 1.
Note 2
Parameter
these settings to the 131 MHz model.
Note 1
Note 1
Symbol
t
f
f
t
t
t
t
f
FIRCYC1
FIRCYC2
FIRDUTY
t
t
f
t
f
BCLKH1
BCLKH2
BCLKL1
BCLKL2
HSCYC
t
t
WHSH
WHSL
t
t
MCYC
CYHM
t
CYHS
t
PCYC
MPH
t
t
Jitter
HSR
SHF
MPL
CH
CL
When HSP unit is used
When HSP unit is used
When HSP unit is used
When HSP unit is used
When HSP unit is used
When HSP unit is used
When HSP unit is used
When HSP unit is used
When HSP unit is used
When HSP unit is used
In FIR 4 Mbps
In FIR 1.152/0.576 Mbps
CLKSEL (2:0) = 111
CLKSEL (2:0) = 110
CLKSEL (2:0) = 101
CLKSEL (2:0) = 100
CLKSEL (2:0) = 011
CLKSEL (2:0) = 010
CLKSEL (2:0) = 001
CLKSEL (2:0) = 000
Note 5
Note 6
Note 5
Note 6
Data Sheet U14691EJ1V0DS00
Condition
Note 3
Note 4
Note 4
47.99520
47.93800
t
t
54.253
108.5
0.585
CYHM
CYHM
MIN.
0.45
0.45
3.5
3.5
40
40
10
45
10
45
10
168.5
147.5
131.1
118.0
TYP.
RFU
98.3
90.7
78.6
48
48
1790.365
48.00480
48.02976
t
t
18.432
MAX.
CYHM
CYHM
f
0.55
0.55
MCYC
3.5
10
10
90
PD30121
MHz
MHz
MHz
MHz
MHz
MHz
MHz
MHz
MHz
MHz
MHz
MHz
Unit
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
%
%