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MX23L1651
16M-BIT [16M x 1] CMOS SERIAL MASK-ROM
FEATURES
GENERAL • 16,777,216 x 1 bit structure • Single Power Supply Operation - 3.0 to 3.6 volt for read operations • Latch-up protected to 100mA from -1V to Vcc +1V PERFORMANCE • High Performance - Fast access time: 20MHz serial clock (50pF + 1TTL Load) • Low Power Consumption - Low active read current: 10mA (typical) at 20MHz - Low standby current: 30uA (CMOS) SOFTWARE FEATURES • Input Data Format - 1-byte Command code, 3-byte address, 1-byte byte address HARDWARE FEATURES • SCLK Input - Serial clock input • SI Input - Serial Data Input • SO Output - Serial Data Output • PACKAGE - 28-pin SOP (330mil)
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GENERAL DESCRIPTION
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The MX23L1651 provide sequential read operation on the whole chip. When the device is not in operation and CS is high, it is put in standby mode and draws less than 30uA DC current.
The MX23L1651 is a CMOS 16,777,216 bit serial Mask ROM, which is configured as 2,097,152 x 8 internally. The MX23L1651 features a serial peripheral interface and software protocol allowing operation on a simple 3- wire bus. The three bus signals are a clock input (SCLK), a serial data input (SI), and a serial data output (SO). Serial peripheral interface access to the device is enabled by CS input.
PIN CONFIGURATIONS
28-PIN SOP (330 mil)
NC NC NC NC NC NC NC NC NC NC NC NC NC NC 1 2 3 4 5 6 7 8 9 10 11 12 13 14 28 27 26 25 24 23 22 21 20 19 18 17 16 15 NC GND VCC NC NC NC SI SO CS SCLK NC NC NC NC
PIN DESCRIPTION
SYMBOL CS SI SO SCLK VCC GND NC DESCRIPTION Chip Select Serial Data Input Serial Data Output Clock Input + 3.3V Power Supply Ground No Internal Connection
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P/N: PM0825
MX23L1651
REV. 1.1, JUN. 23, 2003
1
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MX23L1651
BLOCK DIAGRAM
Address Generator
X-Decoder
Memory Array (4096 x 4096)
Page Buffer Data Register Y-Decoder
SI
CS
Mode Logic
Sense Amplifier
Output Buffer
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SCLK Clock Generator
SO
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P/N: PM0825
2
REV. 1.1, JUN. 23, 2003
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MX23L1651
COMMAND DEFINITION
Command 1st 2nd 3rd 4th 5th 6th 7th 8th 9th Action Read Array 52H AD1 AD2 AD3 BA X X X X n bytes read out until CS goes high (byte)
Note: 1.X is dummy cycle and is necessary 2.AD1 to AD3 are address input data 3.BA is byte address
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1-byte command code Bit7(MSB) Bit6 3-byte address(0 to 0FFFH) AD1: X X AD2: A16 A15 AD3: X X 1-byte byte address(0 to 7FH) BA: X A6
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Bit5 X A14 X A5 Bit4 X A13 X A4 Bit3 A20 A12 X A3 Bit2 A19 A11 X A2 Bit1 A18 A10 A8 A1 Bit0 A17 A9 A7 A0
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P/N: PM0825
3
REV. 1.1, JUN. 23, 2003
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MX23L1651
DEVICE OPERATION
1.When incorrect command is inputted to this LSI, this LSI becomes standby mode and keeps the standby mode until next CS falling edge. In standby mode, SO pin of this LSI should be High-Z. 2.When correct command is inputted to this LSI, this LSI becomes active mode and keeps the active mode until next CSB rising edge.
COMMAND DESCRIPTION (1) Read Array
This command is sent with the 4-byte address (command included), and the byte address, followed by four dummy bytes sent to give the device time to stabilize. The device will then send out data starting at the byte address until CS goes high. The clock to clock out the data is supplied by the master serial interface. The read operation is executed on a segment (512 bytes) basis. If the end of the segment is reached then the device will wrap around to the beginning of the segment. (2) Standby Mode When CS is high and there is no operation in progress, the device is put in standby mode. Typical standby current is less than 30uA.
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DATA SEQUENCE
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Output data is serially sent out through SO pin, synchronized with the rising edge of SCLK, whereas input data is serially read in through SI pin, synchronized with the rising edge of SCLK. The bit sequence for both input and output data is bit 7 (MSB) first, then bit 6, bit 5, ...., and bit 0.(LSB)
ADDRESS SEQUENCE
The address assignment is described as follows : BA: Byte address Bit sequence: AD1:First Address Bit sequence: AD2:Second Address Bit sequence: AD3:Thrid Address Bit sequence: X X A16 X A6 X A15 X A5 X A14 X A4 X A13 X A3 A20 A12 X A2 A19 A11 X A1 A18 A10 A8 A0 A17 A9 A7
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P/N: PM0825
4
REV. 1.1, JUN. 23, 2003
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MX23L1651
ELECTRICAL SPECIFICATIONS
ABSOLUTE MAXIMUM RATINGS
RATING Ambient Operating Temperature Storage Temperature Applied Input Voltage Applied Output Voltage VCC to Ground Potential VALUE 0° C to 70°C -55° C to 125° C -0.5V to 4.6V -0.5V to 4.6V -0.5V to 4.6V
3.During voltage transitions, all pins may overshoot to 4.6V or -0.5V for period up to 20ns. 4.All input and output pins may overshoot to VCC+0.5V while VCC+0.5V is smaller than or equal to 4.6V. 2.Specifi.