参数资料
型号: STK17T88-RF45TR
元件分类: 时钟/数据恢复及定时提取
英文描述: PROGRAMMABLE TIMER, PDSO48
封装: 0.300 INCH, ROHS COMPLIANT, PLASTIC, SSOP-48
文件页数: 12/29页
文件大小: 535K
代理商: STK17T88-RF45TR
2
Jan, 2008
Document Control #ML0024 Rev 2.0
STK17T88
Pin Configurations
VSS
A14
A12
A7
A6
DQ0
DQ1
VCC
DQ2
A3
A2
A1
VCAP
A13
A6
A9
A11
A10
DQ7
DQ6
VSS
A0
NC
44
43
42
41
40
39
38
37
36
35
34
33
32
31
30
29
28
27
26
25
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
NC
E
X1
X2
23
24
A5
INT
NC
A4
48
47
46
45
VCC
HSB
NC
W
NC
DQ5
DQ3
DQ4
G
NC
VRTCbat
VRTCcap
(TOP)
PIN DESCRIPTIONS
Pin Name
I/O
Description
A14-A0
Input
Address: The 15 address inputs select one of 32,768 bytes in the nvSRAM array or one of 16 bytes in the clock
register map
DQ7-DQ0
I/O
Data: Bi-directional 8-bit data bus for accessing the nvSRAM and RTC
E
Input
Chip Enable: The active low E input selects the device
W
Input
Write Enable: The active low W enables data on the DQ pins to be written to the address location selected on
the falling edge of E
G
Input
Output Enable: The active low G input enables the data output buffers during read cycles. De-asserting G high
caused the DQ pins to tri-state.
X1
Output
Crystal Connection, drives crystal on startup
X2
Input
Crystal Connection for 32.768 kHz crystal
VRTCcap
Power Supply
Capacitor supplied backup RTC supply voltage (Left unconnected if VRTCbat is used)
VRTCbat
Power Supply
Battery supplied backup RTC supply voltage (Left unconnected if VRTCcap is used)
VCC
Power Supply
Power: 3.0V, +20%, -10%
HSB
I/O
Hardware Store Busy: When low this output indicates a Store is in progress. When pulled low external to the
chip, it will initiate a nonvolatile STORE operation. A weak pull up resistor keeps this pin high if not connected.
(Connection Optional).
INT
Output
Interrupt Control: Can be programmed to respond to the clock alarm, the watchdog timer and the power monitor.
Programmable to either active high (push/pull) or active low (open-drain)
VCAP
Power Supply
AutoStore Capacitor: Supplies power to nvSRAM during power loss to store data from SRAM to nonvolatile stor-
age elements.
VSS
Power Supply
Ground
(Blank)
No Connect
Unlabeled pins have no internal connections.
48 Pin SSOP
For detailed package size
specifications, see page 27.
SSOP
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PDF描述
STK17T88-RF45 PROGRAMMABLE TIMER, PDSO48
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