2.5” Bulldog User Guide
April 10, 2006
page 10 of 14
The following table depicts the 44-pin, 2mm-signal cable interface pinout.
PIN SIGNAL PIN SIGNAL
1 RESET-
2 GND
3 DATA7
4 DATA8
5 DATA6
6 DATA9
7 DATA5
8 DATA10
9 DATA4
10 DATA11
11 DATA3
12 DATA12
13 DATA2
14 DATA13
15 DATA1
16 DATA14
17 DATA0
18 DATA15
19
GND
20
KEY (NO PIN)
21 DMARQ
22 GND
23 IOW-
24 GND
25 IOR-
26 GND
27 IOCHRDY
28 CSEL
29 DMACK-
30 GND
31 IRQ
32 IOCS16-
33 ADDR1
34 PDIAG-
35 ADDR0
36 ADDR2
37 CS0-
38 CS1-
39 DASP-
40 GND
41 +5VOLTS
42 +5VOLTS
43 GND
44 RESERVED
4. OPERATION
4.1 ECC
The IDE controller utilizes a 72-bit Reed-Solomon Error Detection Code (EDC) and Error
Correction Code (ECC), which provides the following error immunity for each 512-byte block of
data:
1. Corrects up to three random 12-bit symbol errors.
2. Corrects single bursts up to 25 bits.
4.2 WEAR OUT
The time to failure can be logically calculated in hours using the following formula.
# Flash Chips * # Blocks *Re-programming Cycles * Area Rate
Wear Out = ------------------------------------------------------------------------------------
Average Block Programming Rate per hour (Block = 16Kbyte)
Note: The program area is the area that is not changed once it has been programmed. The
remainder of the drive is thus considered “Reprogrammable”. In the case where 64
Kbytes (128 sectors) are written every minute into an area occupying 30% of a 512 MB
disk (1 Gbit x 4 chips), the MTBF is calculated as shown below:
