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PDF N55S064 Data sheet ( Hoja de datos )
| Número de pieza | N55S064 | |
| Descripción | 64M-BIT Low Voltage / Serial MASK ROM | |
| Fabricantes | nuvoton | |
| Logotipo |  |
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N55S064
64M-BIT Low Voltage, Serial MASK ROM
with 50MHz SPI Bus Interface
GENERAL DESCRIPTION
The N55S064 is a 64Mbit (8M Bytes) Serial Mask ROM accessed by a high speed Serial peripheral interface.
KEY FEATURES
• Operating voltage ranges from 3.0V to 3.6V
• Serial Peripheral Interface compatible-mode 0 and 3
• High performance: "fast read" mode at 50MHz and "normal read" at 20MHz
• Low power consumption: 8mA for fast read mode or 4mA for normal read mode
• Low standby current: 15uA
PIN DESCRIPTION
SYMBOL
SCLK
SI
SO
CSB
HOLDB
VCC
VSS
DESCRIPTION
Serial Clock
Serial Data Input
Serial Data Output
Chip Select
Hold to pause the device without
Power Supply
Ground
deselecting the device
ORDER INFORMATION
Part No.
N55S064
Speed
20ns
Grade
Commercial
1 REV. 1.1, MAR., 2010
1 page  
N55S064
DEVICE OPERATION
Stand-by Mode
When incorrect command is inputted to this LSI, this LSI becomes standby mode and keeps in standby mode until
next CS# falling edge. In standby mode, SO pin of this LSI should be High-Z.
Active Mode
When correct command is inputted to this LSI, this LSI becomes active mode and keeps the active mode until next
CS# rising edge.
SPI Feature
Input data is latched on the rising edge of Serial Clock(SCLK) and data shifts out on the falling edge of SCLK. The
difference of SPI mode 0 and mode 3 is shown as Figure 1.
Figure 1. SPI Modes Supported
CPOL CPHA
(SPI mode 0) 0
0 SCLK
shift in
(SPI mode 3) 1
1 SCLK
SI
MSB
SO
shift out
MSB
Note:
CPOL indicates clock polarity of SPI master, CPOL=1 for SCLK high while idle, CPOL=0 for SCLK low while not
transmitting. CPHA indicates clock phase. The combination of CPOL bit and CPHA bit decides which SPI mode is
supported.
5 REV. 1.1, MAR., 2010
5 Page 
N55S064
ELECTRICAL SPECIFICATIONS
ABSOLUTE MAXIMUM RATINGS
RATING
Ambient Operating Temperature
Storage Temperature
Applied Input Voltage
Applied Output Voltage
VCC to Ground Potential
Commercial grade
VALUE
0°C to 70°C
-65°C to 150°C
-0.6V to 4.0V
-0.6V to 4.0V
-0.6V to 4.0V
NOTICE:
1. Stress greater than those listed under ABSOLUTE MAXIMUM RATINGS may cause permanent damage of the
device. This is stress rating only and functional operational sections of this specification is not implied. Exposure
to absolute maximum rating conditions in long period of time may affect reliability.
2. Specifications contained within the following Table 2 and 3 are subjects to change.
3. During voltage transitions, all pins may overshoot Vss to -2.0V and Vcc to +2.0V for periods up to 20ns, see Figure 6,7.
Figure 6.Maximum Negative Overshoot
Waveform
Vss
20ns
20ns
Vss - 2.0V
20ns
Figure 7. Maximum Positive Overshoot
Waveform
Vcc + 2.0V
20ns
Vcc
20ns
20ns
CAPACITANCE TA = 25°C, f = 20 MHz
SYMBOL PARAMETER
CIN Input Capacitance
COUT Output Capacitance
MIN.
TYP
MAX.
6
8
UNIT
pF
pF
CONDITIONS
VIN = 0V
VOUT = 0V
11 REV. 1.1, MAR., 2010
11 Page | ||
| Páginas | Total 17 Páginas | |
| PDF Descargar | [ Datasheet N55S064.PDF ] | |
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