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参数资料
| 型号： | IS93C56A-3PI |
| 元件分类： | EEPROM |
| 英文描述： | EEPROM |
| 中文描述： | EEPROM的 |
| 文件页数： | 7/13页 |
| 文件大小： | 65K |
| 代理商： | IS93C56A-3PI |
Integrated Silicon Solution, Inc. — www.issi.com — 1-800-379-4774
3
Rev. A
11/12/02
IS93C46A
IS93C56A
IS93C66A
ISSI
Write All (WRALL)
The write all (WRALL) instruction programs all registers
with the data pattern specified in the instruction. As with
the WRITE instruction, the falling edge of CS must occur
to initiate the self-timed programming cycle. If CS is then
brought HIGH after a minimum wait of 250 ns (tCS), the
DOUT pin indicates the READY/BUSY status of the chip (see
Figure 6).
Write Disable (WDS)
The write disable (WDS) instruction disables all programming
capabilities. This protects the entire device against acci-
dental modification of data until a WEN instruction is
executed. (When Vcc is applied, this part powers up in the
write disabled state.) To protect data, a WDS instruction
should be executed upon completion of each programming
operation.
Erase Register (ERASE)
After the erase instruction is entered, CS must be brought
LOW. The falling edge of CS initiates the self-timed internal
programming cycle. Bringing CS HIGH after a minimum of
tCS, will cause DOUT to indicate the READ/BUSY status of the
chip: a logical “0” indicates programming is still in progress;
a logical “1” indicates the erase cycle is complete and the
part is ready for another instruction (see Figure 8).
Erase All (ERAL)
Full chip erase is provided for ease of programming. Erasing
the entire chip involves setting all bits in the entire memory
array to a logical “1” (see Figure 9).
Write Enable (WEN)
The write enable (WEN) instruction must be executed
before any device programming (WRITE, WRALL,
ERASE, and ERAL) can be done. When Vcc is applied,
this device powers up in the write disabled state. The
device then remains in a write disabled state until a WEN
instruction is executed. Thereafter, the device remains
enabled until a WDS instruction is executed or until Vcc
is removed. (See Figure 4.) (Note: Chip select must
remain LOW until Vcc reaches its operational value.)
Write (WRITE)
The WRITE instruction includes 8 or 16 bits of data to be
written into the specified register. After the last data bit
has been applied to DIN, and before the next rising edge
of SK, CS must be brought LOW. The falling edge of CS
initiates the self-timed programming cycle.
If CS is brought HIGH, after a minimum wait of 250 ns
(5V operation) after the falling edge of CS (tCS) DOUT will
indicate the READY/BUSY status of the chip. Logical
“0” means programming is still in progress, logical “1”
means the selected register has been written, and the
part is ready for another instruction (see Figure 5).
(NOTE: The combination of CS HIGH, DIN HIGH and
the rising edge of the SK clock, resets the READY/
BUSY flag. Therefore, to access the READY/BUSY
flag, this combination of control signals should be
avoided.) Before a WRITE instruction can be executed,
the device must be write enabled (see WEN).
INSTRUCTION SET - IS93C46A
8-bit Organization
16-bit Organization
(ORG = GND)
(ORG = Vcc)
Instruction
Start Bit
OP Code
Address (1)
Input Data
Address (1) Input Data
READ
1
10
(A6-A0)—
(A5-A0)—
WEN (Write Enable)
1
00
11xxxxx
—
11xxxx
—
WRITE
1
01
(A6-A0)(D7-D0) (3)
(A5-A0)(D15-D0) (2)
WRALL (Write All Registers)
1
00
01xxxxx
(D7-D0) (3)
01xxxx
(D15-D0) (2)
WDS (Write Disable)
1
00
00xxxxx
—
00xxxx
—
ERASE
1
11
(A6-A0)—
(A5-A0)—
ERAL (Erase All Registers)
1
00
10xxxxx
—
10xxxx
—
Notes:
1. x = Don't care bit.
2. If input data is not 16 bits exactly, the last 16 bits will be taken as input data.
3. If input data is not 8 bits exactly, the last 8 bits will be taken as input data.
相关PDF资料 |
PDF描述 |
|---|---|
| IS93C56A-3ZI | EEPROM |
| IS93C56A-GRA | EEPROM |
| IS93C56A-PA | EEPROM |
| IS93C66 | |
| IS93C66A-3GI | EEPROM |
相关代理商/技术参数 |
参数描述 |
|---|---|
| IS93C56A-3PLA3 | 制造商:ISSI 制造商全称:Integrated Silicon Solution, Inc 功能描述:2K-BIT/4K-BIT SERIAL ELECTRICALLY ERASABLE PROM |
| IS93C56A-3ZI | 制造商:未知厂家 制造商全称:未知厂家 功能描述:EEPROM |
| IS93C56A-3ZLA3 | 制造商:ISSI 制造商全称:Integrated Silicon Solution, Inc 功能描述:2K-BIT/4K-BIT SERIAL ELECTRICALLY ERASABLE PROM |
| IS93C56A-GRA | 制造商:未知厂家 制造商全称:未知厂家 功能描述:EEPROM |
| IS93C56A-PA | 制造商:未知厂家 制造商全称:未知厂家 功能描述:EEPROM |
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