VIA Technologies KT880 Specifications Page 24
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VT8237R Data Sheet
Revision 2.06 December 15, 2004 -16- Pin Descriptions
UltraDMA-133 / 100 / 66 / 33 Enhanced IDE Interface (continued)
Signal Name Pin # I/O Signal Description
PDCS1# / strap V22 O Primary Master Chip Select. This signal corresponds to CS1FX# on the
primary IDE connector.
PDCS3# / strap V23 O Primary Slave Chip Select. This signal corresponds to CS3FX# on the
primary IDE connector.
SDCS1#
AF25 O Secondary Master Chip Select. This signal corresponds to CS17X# on the
secondary IDE connector.
SDCS3#
AF26 O Secondary Slave Chip Select. This signal corresponds to CS37X# on the
secondary IDE connector.
PDA[2-0] / strap W24, V25, W23 O Primary Disk Address. PDA[2:0] are used to indicate which byte in either the
ATA command block or control block is being accessed. Strap information is
communicated to the north bridge via VD[6:4].
SDA[2-0]
AE24, AC22,
AF24
O Secondary Disk Address. SDA[2:0] are used to indicate which byte in either
the ATA command block or control block is being accessed.
PDD[15-0]
(see pin list) IO
Primary Disk Data.
SDD[15-0]
(see pin list) IO
Secondary Disk Data.
Serial ATA Pin Descriptions
Serial ATA Interface
Signal Name Pin # I/O Signal Description
SRX1+
AE13 I
SATA Port 1 Receive +
SRX1–
AF13 I
SATA Port 1 Receive –
SRX2+
AE15 I
SATA Port 2 Receive +
SRX2–
AF15 I
SATA Port 2 Receive –
STX1+
AB13 I
SATA Port 1 Transmit +
STX1–
AC13 I
SATA Port 1 Transmit –
STX2+
AB15 I
SATA Port 2 Transmit +
STX2–
AC15 I
SATA Port 2 Transmit –
SXI
AF10 I
SATA Crystal In.
SXO
AE10 O
SATA Crystal Out.
SREXT
AD11 AI
SATA External Resistor.
SATALED# /
VIDSEL / GPIO28
AC8 OD SATA LED. Device 17 Function 0 RxE5[0] = 1.
VCCAO
AC10 P SATA Oscillator Power. 2.5V ±5%.
GNDAO
AB10 P
SATA Oscillator Ground.
VCCAS
AB11, AB17,
AC11, AC17
P SATA Power. 2.5V ±5%.
GNDAS
AB12, AB16,
AC12, AC16
P
SATA Ground.
VCCATS
W12-16 P SATA Power. 2.5V ±5%.
GNDATS
AB14, AC14,
AD12-16,
AE12, AE14, AE16,
AF12, AF14, AF16
P
SATA Ground.
VCCA33
AE11 P SATA Power. 3.3V ±5%.
GNDA33
AF11 P
SATA Ground
- Data Sheet 1
- Copyright Notice: 2
- Disclaimer Notice: 2
- Offices: 2
- REVISION HISTORY 3
- TABLE OF CONTENTS 4
- LIST OF FIGURES 7
- LIST OF TABLES 8
- VT8237R Data Sheet 10
- OVERVIEW 12
- PIN DESCRIPTIONS 18
- CPU Interface 19
- CPU Speed Control Interface 19
- PCI Bus Interface 20
- Serial EEPROM Interface 21
- Serial ATA Interface 24
- AC97 Audio / Modem Interface 25
- Serial IRQ 25
- PC / PCI DMA 25
- Internal Keyboard Controller 26
- Speaker 26
- Programmable Chip Selects 27
- General Purpose Inputs 27
- General Purpose Outputs 28
- General Purpose I/O 28
- Power and Ground 30
- Strap Pins 31
- REGISTERS 32
- Reserved Default Acc 34
- KB / Mouse Wakeu 34
- APIC Registers Default Acc 34
- SATA Confi 35
- IDE I/O Registers Default Acc 37
- USB Control Default Acc 38
- USB I/O Re 38
- USB Control Default Acc 42
- Host Controller O 42
- AC97 SGD I/O Re 48
- MC97 SGD I/O Re 48
- Power Management Default Acc 49
- Power Management Default Acc 50
- Register Descriptions 51
- .................. RW 58
- ................... RW 58
- ........................RW 63
- ................... RW 64
- Request (00h)...RW 66
- SATA LITE Control (00h) .. RW 66
- .......................RW 73
- ...................... RW 73
- ..................... RW 73
- .......RW 74
- ....................RW 75
- Access Data (00000000h) .RW 99
- ...............RW 101
- ).........................RW 109
- ...... default 110
- ......................RW 112
- ...................RW 113
- ) ..................... RW 113
- .............. RW 123
- 3h (command match) 137
- DataType / SampleRateRW 144
- ....................RWC 145
- Current Count.. RO 146
- 0 SGD Stop Index ... RW 148
- 1 SGD Stop Index ... RW 150
- ................. RW 157
- .... RO 163
- ............ RO 163
- FUNCTIONAL DESCRIPTIONS 172
- ELECTRICAL SPECIFICATIONS 177
- Register Description 178
- Power Requirements 179
- VT8237R 180
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