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参数资料
| 型号： | 93AA46-I/MS |
| 元件分类： | PROM |
| 英文描述： | 64 X 16 MICROWIRE BUS SERIAL EEPROM, PDSO8 |
| 封装： | PLASTIC, MSOP-8 |
| 文件页数： | 3/20页 |
| 文件大小： | 510K |
| 代理商： | 93AA46-I/MS |
2002 Microchip Technology Inc.
DS21749A-page 11
93XX46, 93XX46A/B
3.0
PIN DESCRIPTIONS
FIGURE 3-1:
PIN DESCRIPTIONS
3.1
CHIP SELECT (CS)
A high level selects the device; a low level deselects
the device and forces it into Standby mode. However,
a programming cycle which is already in progress will
be completed, regardless of the Chip Select (CS) input
signal. If CS is brought low during a program cycle, the
device will go into Standby mode as soon as the
programming cycle is completed.
CS must be low for 250 ns minimum (T
CSL) between
consecutive instructions. If CS is low, the internal
control logic is held in a RESET status.
Input filter spike suppression was added to reduce
susceptibility to noise.
3.2
SERIAL CLOCK (CLK)
The Serial Clock is used to synchronize the communi-
cation between a master device and the 93XX series
device. Opcodes, address and data bits are clocked in
on the positive edge of CLK. Data bits are also clocked
out on the positive edge of CLK.
CLK can be stopped anywhere in the transmission
sequence (at high or low level) and can be continued
anytime with respect to clock high time (T
CKH) and
clock low time (T
CKL). This gives the controlling master
freedom in preparing opcode, address and data.
CLK is a “Don't Care” if CS is low (device deselected).
If CS is high, but the START condition has not been
detected, any number of clock cycles can be received
by the device without changing its status (i.e., waiting
for a START condition).
CLK cycles are not required during the self-timed
WRITE (i.e., auto ERASE/WRITE) cycle.
After detection of a START condition the specified num-
ber of clock cycles (respectively low to high transitions
of CLK) must be provided. These clock cycles are
required to clock in all required opcode, address and
data bits before an instruction is executed. CLK and DI
then become don't care inputs waiting for a new START
condition to be detected.
Input filter spike suppression was added to reduce
susceptibility to noise.
3.3
DATA IN (DI)
Data In (DI) is used to clock in a START bit, opcode,
address and data synchronously with the CLK input.
Input filter spike suppression was added to reduce
susceptibility to noise.
3.4
DATA OUT (DO)
Data Out (DO) is used in the READ mode to output
data synchronously with the CLK input (T
PD after the
positive edge of CLK).
This pin also provides READY/BUSY status informa-
tion during ERASE and WRITE cycles. READY/BUSY
status information is available on the DO pin if CS is
brought high after being low for minimum chip select
low time (T
CSL) and an ERASE or WRITE operation
has been initiated.
The status signal is not available on DO, if CS is held
low during the entire ERASE or WRITE cycle. In this
case, DO is in the HIGH-Z mode. If status is checked
after the ERASE/WRITE cycle, the data line will be high
to indicate the device is ready.
3.5
ORGANIZATION (ORG)*
When the ORG pin is connected to V
CC or Logic HI, the
(x16) memory organization is selected. When the ORG
pin is tied to V
SS or Logic LO, the (x8) memory organi-
zation is selected. For proper operation, ORG must be
tied to a valid logic level.
On the dedicated 'A' and 'B' devices the user selectable
ORG function is not present. (No internal connection.)
Name
MSOP
6-LEAD
SOT-23
Function
CS
1
5
Chip Select
CLK
2
4
Serial Clock
DI
3
Data In
DO
4
1
Data Out
Vss
5
2
Ground
ORG/NC
6
N/A
Organization / No Connect
(No internal connection for 93XX46A/B)
NC
7
N/A
No Connect (No Internal Connection)
Vcc
8
6
Power Supply
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相关代理商/技术参数 |
参数描述 |
|---|---|
| 93AA46P | 制造商:Microchip Technology Inc 功能描述: |
| 93AA46-P | 制造商:MICROCHIP 制造商全称:Microchip Technology 功能描述:1K/2K/4K 1.8V Microwire Serial EEPROM |
| 93AA46-SM | 制造商:MICROCHIP 制造商全称:Microchip Technology 功能描述:1K/2K/4K 1.8V Microwire Serial EEPROM |
| 93AA46-SN | 制造商:MICROCHIP 制造商全称:Microchip Technology 功能描述:1K/2K/4K 1.8V Microwire Serial EEPROM |
| 93AA46T/P | 制造商:MICROCHIP 制造商全称:Microchip Technology 功能描述:1K/2K/4K 1.8V Microwire Serial EEPROM |
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