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PDF IT8706R Data sheet ( Hoja de datos )
| Número de pieza | IT8706R | |
| Descripción | Special General Purpose I/O | |
| Fabricantes | Integrated Technology Express | |
| Logotipo |  |
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IT8706R
Special General Purpose I/O
Preliminary Specification V0.1
1 page  
Features & General Description
1. Features
Low Pin Count Interface
− Complies with Intel Low Pin Count Interface Specification Rev. 1.0
18 General Purpose I/O Pins
− Input mode supports switch de-bounce
− Simple Input/Output function
Single +5V Power Supply
28-pin SOP
2. General Description
The IT8706R is a Low Pin Count Interface-based General Purpose I/O (GPIO) chip. The IT8706R provides 18
GPIO ports with internal button de-bounced circuits and SMI generation circuit. The device operates with only
single +5V power supply. The IT8706R is available in 28-pin SOP package.
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1 IT8706R V0.1
ITPM-PN-200012 Joseph Huang, Feb. 21, 2000
5 Page 
IT8706R Pin Descriptions
5. IT8706R Pin Descriptions (26 signal pins + 2 VCC/GND)
Table 5-1. Pin Description of LPC Bus Interface
Symbol
Pin(s) No. Attribute
Description
Supplies
VCC
28 PWR
GND
14 GND
LPC Bus Interface Signals
LRESET#
8
DI
LFRAME#
9
DI
LAD[0:3]
10 – 13
DIO8
LCLK
SMI#
15 DI
7 DOD8
GPIO Signals
+5V Power Supply.
Ground.
LPC RESET #.
LPC Frame #. This signal indicates the start of LPC cycle.
LPC Address/Data 0 - 3. 4-bit LPC address/bi-directional data lines. LAD0 is the
LSB and LAD3 is the MSB.
LPC Clock. 33 MHz PCI clock input.
System Management Interrupt #.
SMI# is an active low output asserted by this chip to inform the system that some
active inputs are detected.
GP1[7:0]
GP2[7:0]
GP3[1:0]/
MCI[1:0]
23 – 16
4 – 1, 27 –
24
6–5
DIOD8
DIOD8
DIOD8/DI
General Purpose I/O 1 [7:0].
Including input detecting and simple I/O functions.
General Purpose I/O 2 [7:0].
Including input detecting and simple I/O functions.
General Purpose I/O 3 [1:0]/MCI[1:0].
Including input detecting and simple I/O functions.
During LRESET#, these pins are inputs for MCI[1:0] power-on strapping options.
IO Cell:
DOD8: 8mA Digital Open-Drain Output buffer
DIO8: 8mA Digital Input/Output buffer
DIOD8: 8mA Digital Open-Drain Input/Output buffer
DI: Digital Input
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7
IT8706R V0.1
11 Page | ||
| Páginas | Total 27 Páginas | |
| PDF Descargar | [ Datasheet IT8706R.PDF ] | |
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