Cypress CY7C67300 Manual De Usuario
CY7C67300
Document #: 38-08015 Rev. *J
Page 10 of 99
IDE Features
■
Programmable IO mode 0–4
■
Block mode transfers
■
Direct memory access to/from internal memory through the IDE
data register
data register
IDE Pins
Charge Pump Interface
VBUS for the USB OTG port can be produced by EZ-Host using
its built in charge pump and some external components. Ensure
the circuit connections look similar to the following diagram.
its built in charge pump and some external components. Ensure
the circuit connections look similar to the following diagram.
Component details:
■
D1 and D2: Schottky diodes with a current rating greater than
60 mA
60 mA
■
C1: Ceramic capacitor with a capacitance of 0.1 µF
■
C2: Make capacitor value no more that 6.5 µF since that is the
maximum capacitance allowed by the USB OTG specifications
for a dual role device. The minimum value of C2 is 1 µF. There
are no restrictions on the type of capacitor for C2.
maximum capacitance allowed by the USB OTG specifications
for a dual role device. The minimum value of C2 is 1 µF. There
are no restrictions on the type of capacitor for C2.
If the VBUS charge pump circuit is not to be used, CSWITCHA,
CSWITCHB, and OTGVBUS can be left unconnected.
CSWITCHB, and OTGVBUS can be left unconnected.
Charge Pump Features
■
Meets OTG Supplement Requirements, see
for details.
Charge Pump Pins
Table 14. IDE Throughput
Mode
ATA/ATAPI-4
Min Cycle Time
Actual
Min Cycle Time
ATA/ATPI-4
Max Transfer Rate
Actual
Max Transfer Rate
PIO Mode 0
600 ns
30T = 625 ns
3.33 MB/s
3.2 MB/s
PIO Mode 1
383 ns
20T = 416.7 ns
5.22 MB/s
4.8 MB/s
PIO Mode 2
240
13T = 270.8 ns
8.33 MB/s
7.38 MB/s
PIO Mode 3
180 ns
10T = 208.3 ns
11.11 MB/s
9.6 MB/s
PIO Mode 4
120 ns
8T = 166.7 ns
16.67 MB/s
12.0 MB/s
T = System clock period = 1/48 MHz.
Table 15. IDE Interface Pins
Pin Name
Pin Number
IORDY
46
IOR
47
IOW
48
CS1
50
CS0
52
A2
53
A1
54
A0
55
D15
56
D14
57
D13
58
D12
59
D11
60
D10
61
D9
65
D8
66
D7
86
D6
87
D5
89
D4
90
D3
91
D2
92
D1
93
D0
94
Figure 5. Charge Pump
Table 16. Charge Pump Interface Pins
Pin Name
Pin Number
OTGVBUS
11
CSwitchA
13
CSwitchB
12
VBUS
D1
D2
C1
C2
CSWITCHA
CSWITCHB
OTGVBUS
CY7C67300