參數(shù)資料
型號(hào): VRC4171A
廠商: NEC Corp.
英文描述: Companion Chip for VR4100 Family MIPS RISC Microprocessor(VR4100系列RSIC微處理器的配對(duì)芯片)
中文描述: 同伴芯片為VR4100家庭的MIPS RISC微處理器(VR4100系列重結(jié)晶微處理器的配對(duì)芯片)
文件頁(yè)數(shù): 5/16頁(yè)
文件大?。?/td> 114K
代理商: VRC4171A
5
V
RC
4171A Companion Chip
.
Note:
Leave X1 open with no MCLK input.
Table 4. DC Characteristics (
V
DD
= 3.3 V ±0.165 V: T
j
= 0 to +70°C)
Parameter
Symbol
Min.
Typ.
Max.
Unit
Condition
All Buffer Types
Output current, low (3 mA)
I
OL
3
mA
V
OL
= 0.4 volt
Output current, low (6 mA)
I
OL
6
mA
V
OL
= 0.4 volt
5-Volt-Tolerant Block
Output current, high (3 mA)
I
OH
–3
mA
V
OH
= 2.4 volts
Output current, high (6 mA)
I
OH
–3
mA
V
OH
= 2.4 volts
3.3-Volt Interface Block
Output current, high (3 mA)
I
OH
–3
mA
V
OH
= 2.4 volts
Output current, high (6 mA)
I
OH
–6
mA
V
OH
= 2.4 volts
Output voltage, high
V
OH
0.9 V
DD
V
I
OH
= –500 μA
Output voltage, low
V
OL
0.1 V
DD
V
I
OL
= 1500 μA
V
CC
Current
LCD only
I
CC1
60
mA
V
CC
= 3.3 volts
MCLK = 60 MHz
VCLK = 20 MHz
PC Card off
65
mA
MCLK = 50 MHz
VCLK = 25 MHz
LCD plus PC Card active
I
CC2
90
mA
V
CC
= 3.3 volts
MCLK = 60 MHz
VCLK = 20 MHz
BUSCLK = 8 MHz
95
mA
MCLK = 50 MHz
VCLK = 25 MHz
Hibernate mode
I
CC3
100
μA
Gated_I enable
CRYL-INH enable
LCD panel off
Frame buffer PC Card
self-refresh off
Table 5. Clock Operation
Parameter
Symbol
Min.
Typ.
Max.
Unit
Condition
X1, X2 crystal input
f
xx
50
MHz
Crystal oscillator
X2 clock input
(Note)
F
x
66
MHz
External clock with 60 ns DRAMs
MCLK clock input
F
m
80
MHz
External clock with 50 ns DRAMs
66.6
MHz
External clock with 60 ns DRAMs
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