Freescale Semiconductor MPC5200, Application Note, Page: 3 / 20

ATA Interface
MPC5200 ATA Interface, Rev. 0
Freescale Semiconductor 3
2.1 Electrical Characteristics
ATA is a voltage level interface and the table below defines the voltage levels for logical ones and zeroes
or input and output values.
2.2 Signals
Table 1. ATA DC Characteristics
Description Min Max
I
oL
Driver sink current
1
NOTES:
1
I
oL
for DASP shall be 12 mA minimum to meet legacy timing and signal integrity.
4 mA —
I
oH
Driver source current
2
2
IoH value at 400 mA is insufficient in the case of DMARQ that is typically pulled low by a 5.6 kW
resistor.
400
µ
A —
V
iH
Voltage input high (logical one) 2.0 Vdc —
V
iL
Voltage input low (logical zero) — 0.8 Vdc
V
oH
Voltage output high (I
oH
=-400
µ
A, logical one) 2.4 Vdc —
V
oL
Voltage output low (I
oL
= 12 mA, logical zero) — 0.5 Vdc
Table 2. ATA Signals
ATA Signal ATA Acronym MPC5200 Pin Direction
40-Pin
ATA Cable
Cable select CSEL — > 28
Chip select 0 CS0- ATA_CSB0 > 37
Chip select 1 CS1- ATA_CSB1 > 38
Data bus bit 0 DD0 ATA_DATA_0 <> 17
Data bus bit 1 DD1 ATA_DATA_1 <> 15
Data bus bit 2 DD2 ATA_DATA_2 <> 13
Data bus bit 3 DD3 ATA_DATA_3 <> 11
Data bus bit 4 DD4 ATA_DATA_4 <> 9
Data bus bit 5 DD5 ATA_DATA_5 <> 7
Data bus bit 6 DD6 ATA_DATA_6 <> 4
Data bus bit 7 DD7 ATA_DATA_7 <> 3
Data bus bit 8 DD8 ATA_DATA_8 <> 4
Data bus bit 9 DD9 ATA_DATA_9 <> 6
Data bus bit 10 DD10 ATA_DATA_10 <> 8
Data bus bit 11 DD11 ATA_DATA_11 <> 10
Data bus bit 12 DD12 ATA_DATA_12 <> 12
Data bus bit 13 DD13 ATA_DATA_13 <> 14