X5325 Intersil Corporation, X5325 Datasheet - Page 4

• Manufacturer Part Number: X5325
• Description: (X5323 / X5325) CPU Supervisor with 32Kb SPI EEPROM
• Manufacturer: Intersil Corporation

PIN CONFIGURATION
PIN DESCRIPTION
(SOIC/PDIP)
Pin
1
2
5
6
3
4
8
7
CS/WDT
V
WP
SO
SS
3-5,10-12
TSSOP
Pin
14
13
1
2
8
9
6
7
1
2
3
4
8 Ld SOIC/PDIP
X5323/25
4
CS/WDI
RESET/
RESET
Name
SCK
V
V
WP
SO
NC
SI
SS
CC
8
7
6
5
Chip Select Input. CS HIGH, deselects the device and the SO output pin is at a
high impedance state. Unless a nonvolatile write cycle is underway, the
device will be in the standby power mode. CS LOW enables the device, placing
it in the active power mode. Prior to the start of any operation after power-up, a
HIGH to LOW transition on CS is required.
Watchdog Input. A HIGH to LOW transition on the WDI pin restarts the watch-
dog timer. The absence of a HIGH to LOW transition within the watchdog time
out period results in RESET/RESET going active.
Serial Output. SO is a push/pull serial data output pin. A read cycle shifts data out
on this pin. The falling edge of the serial clock (SCK) clocks the data out.
Serial Input. SI is a serial data input pin. Input all opcodes, byte addresses, and
memory data on this pin. The rising edge of the serial clock (SCK) latches the input
data. Send all opcodes (Table 1), addresses and data MSB first.
Serial Clock. The serial clock controls the serial bus timing for data input and
output. The rising edge of SCK latches in the opcode, address, or data bits present
on the SI pin. The falling edge of SCK changes the data output on the SO pin.
Write Protect. The WP pin works in conjunction with a nonvolatile WPEN bit to
“lock” the setting of the watchdog timer control and the memory write protect bits.
Ground
Supply Voltage
Reset Output. RESET/RESET is an active LOW/HIGH, open drain output which
goes active whenever V
main active until V
SET/RESET goes active if the watchdog timer is enabled and CS
remains either HIGH or LOW longer than the selectable watchdog time out
period. A falling edge of CS will reset the watchdog timer. RESET/RESET goes
active on power-up at about 1V and remains active for 200ms after the power
supply stabilizes.
No internal connections
RESET/RESET
SCK
SI
V
CC
X5323, X5325
CC
rises above the minimum V
CS/WDT
CC
falls below the minimum V
V
SO
NC
NC
NC
WP
SS
Function
1
2
3
4
5
6
7
14 Ld TSSOP
X5323/25
CC
14
13
12
11
10
9
8
sense level for 200ms. RE-
CC
RESET/RESET
NC
NC
NC
SCK
SI
V
sense level. It will re-
CC
October 27, 2005
FN8131.1