Z4A232I STEC, Z4A232I Datasheet - Page 33

• Manufacturer Part Number: Z4A232I
• Manufacturer: STEC
• Type: Solid State Driver

Specifications of Z4A232I

• Density: 32GByte
• Operating Supply Voltage (typ): 5V
• Operating Temperature (min): -40C
• Operating Temperature (max): 85C
• Package Type: Not Required
• Mounting: Screw
• Pin Count: 44
• Operating Temperature Classification: Industrial
• Operating Supply Voltage (min): 4.75V
• Operating Supply Voltage (max): 5.25V
• Programmable: Yes
• Lead Free Status / Rohs Status: Not Compliant

Zeus 2.5-Inch ATA Solid State Drive
Primary and Secondary Modes
The Zeus SSD is configured as a high-performance I/O device and supports Primary (Device 0) and
Secondary (Device 1) modes:
I/O Primary and Secondary ATA (IDE) Modes
Primary and secondary drive addressing modes allow hosts to use the ATA-standard’s reserved disk
drive I/O addresses. This provides system designers with the simplest way to accommodate ATA-
protocol devices.
Addressing Modes
Zeus SSDs, on a command-by-command basis, can operate in either CHS or LBA addressing
modes. Identify Drive Information (See
whether the drive supports LBA mode. The host selects LBA mode via the Drive/Head register.
Sector Number, Cylinder Low, Cylinder High, and Drive/Head register bits HS3=0 contain the zero-
based LBA. The sectors are linearly mapped with: LBA = 0 => Cylinder 0, Head 0, Sector 1.
Regardless of the translation mode, a sector LBA address does not change. LBA = (Cylinder * No of
Heads + Head) * (Sectors/Track) + (Sector - 1). Table 6 lists the supported IDE addressing modes.
Device Mode
#CS0
1
1
1
0
1
1
0
0
0
0
0
0
0
0
Primary
Secondary
#CS1
1
0
0
0
0
0
1
1
1
1
1
1
1
1
Description
Drive address at system ATA I/O address 1F0h - 1F7h and 3F6h - 3F7h. The
host must provide chip-enable #CS0 and #CS1. The SSD decodes addresses
DA0 - DA2.
Drive address at system ATA I/O address 170h - 177h and 376h - 377h. The
host must provide chip-enable #CS0 and #CS1. The SSD decodes addresses
DA0 - DA2.
Table 6.
DA2
X
X
0
1
1
1
0
0
0
0
1
1
1
1
ATA (IDE) Bus Addressing Modes
DA1
X
X
0
X
1
1
0
0
1
1
0
0
1
1
Identify Drive Information
DA0
X
X
X
X
0
1
0
1
0
1
0
1
0
1
Hi-Z
Hi-Z
Hi-Z
Invalid
Alternate Status
Device Address
Data
Error
Sector Count
Sector Number
Cylinder Low
Cylinder High
Drive/Head
Status
#IORD - “0”
on page 26.) signals the host
Not Used
Not Used
Not Used
Invalid
Device Control
Not Used
Data
Feature
Sector Count
Sector Number
Cylinder Low
Cylinder High
Drive/Head
Command
#IOWR - “0”
17