PCF2128 데이터 시트보기 (PDF) - Philips Electronics
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PCF2128 Datasheet PDF : 10 Pages
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NXP Semiconductors
6. Pinning information
6.1 Pinning
PCF2128
Real time clock / calendar
SCL 1
SDI 2
SDO 3
SDA/CE 4
IFS 5
TS 6
CLKOUT 7
VSS 8
n.c. 9
n.c. 10
PCF2128
20 VDD
19 VBAT
18 VOUT
17 INT
16 RST
15 PFI
14 PFO
13 TEST
12 n.c.
11 n.c.
001aag060
Fig 2. Pin configuration SO20
Fig 3. SO20 (3d)
die
oscillator
001aag576
Table 3: Pin description PCF2128
Symbol Pin Description
SCL
1 combined serial clock input for both I2C
and SPI interface. May float when CE
inactive.
SDI
2 serial data input for SPI interface. May
float when CE inactive.
SDO
3 serial data output for SPI interface,
push-pull
SDA / CE 4
combined serial data input / output for the
I2C interface and chip enable input (active
LOW) for the SPI interface.
IFS
5 interface selector input
• connect to ground to select the SPI
interface
• connect to VOUT (pin 18) to select the
I2C interface
TS
6 timestamp input (active LOW) with 200 kΩ
internal pull-up resistor
CLKOUT 7 clock output (open drain)
VSS
8 ground
nc
9 Do not connect and do not use as feed
through.
nc
10 Do not connect and do not use as feed
through.
Symbol Pin Description
VDD
20 positive supply voltage
VBAT
VOUT
INT
RST
19 battery backup supply voltage
18 battery backed output voltage
17 interrupt output (open-drain; active
LOW)
16 reset output (open drain; active LOW)
PFI
15 power fail input
PFO
TEST
nc
nc
14 power fail output (open drain; active
LOW)
13 Do not connect and do not use as feed
through.
12 Do not connect and do not use as feed
through.
11 Do not connect and do not use as feed
through.
PCF2128_SDS_0
Preliminary [short] data sheet
Rev. 00.03 — 4 June 2007
© NXP B.V. 2007. All rights reserved.
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