Cypress CY7C68320C-56LTXC Ez-usb at2lpâ ¢ usb 2.0 to ata/atapi bridge Datasheet

CY7C68300C, CY7C68301C
CY7C68320C, CY7C68321C
EZ-USB AT2LP™ USB 2.0 to
ATA/ATAPI Bridge
Features
■
Fixed Function Mass Storage Device—Requires no Firmware
■
Two Power Modes: Self Powered and USB Bus Powered to
enable Bus Powered CF Readers and Truly Portable USB Hard
Drives
■
Certified Compliant for USB 2.0 (TID# 40490119), the USB
Mass Storage Class, and the USB Mass Storage Class
Bulk-Only Transport (BOT) Specification
■
Operates at High Speed (480 Mbps) or Full Speed (12 Mbps)
USB
■
Complies with ATA/ATAPI-6 Specification
■
Supports 48-bit Addressing for Large Hard Drives
■
Supports ATA Security Features
■
■
Supports Compact Flash and one ATA/ATAPI Device
■
Supports Board-level Manufacturing Test using the USB I/F
■
Can Place the ATA Interface in High Impedance (Hi-Z) to enable
Sharing of the ATA Bus with another Controller such as an
IEEE-1394 to ATA Bridge Chip or MP3 Decoder)
■
Low Power 3.3V Operation
■
Fully Compatible with Native USB Mass Storage Class Drivers
■
Cypress Mass Storage Class Drivers available for Windows
(98SE, ME, 2000, XP) and Mac OS X operating systems
Features (CY7C68320C/CY7C68321C only)
■
Supports HID Interface or Custom GPIOs to enable features
such as Single Button Backup, Power Off, LED-based Notification, and so on
Supports any ATA Command with the ATACB Function
■
56-Pin QFN and 100-Pin TQFP Pb-free Packages
■
Supports Mode Page 5 for BIOS Boot Support
■
CY7C68321C is Ideal for Battery Powered Designs
■
Supports ATAPI Serial Number VPD Page Retrieval for Digital
Rights Management (DRM) Compatibility
■
CY7C68320C is Ideal for Self and Bus Powered Designs
■
Supports PIO Modes 0, 3, and 4, Multiword DMA Mode 2, and
UDMA Modes 2, 3, and 4
■
Pin Compatible with CY7C68300A (using Backward
Compatibility Mode)
■
Uses one small External Serial EEPROM for Storage of USB
Descriptors and Device Configuration Data
■
56-Pin SSOP and 56-Pin QFN Pb-free Packages
■
ATA Interface IRQ Signal Support
■
CY7C68301C is Ideal for Battery Powered Designs
■
Supports one or two ATA/ATAPI Devices
■
CY7C68300C is Ideal for Self and Bus Powered Designs
Cypress Semiconductor Corporation
Document 001-05809 Rev. *C
•
Features (CY7C68300C/CY7C68301C only)
198 Champion Court
•
San Jose, CA 95134-1709
•
408-943-2600
Revised July 08, 2009
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CY7C68300C, CY7C68301C
CY7C68320C, CY7C68321C
SCL
I2C Bus Master
SDA
24
MHz
XTAL
Reset
Logic Block Diagram
Misc control signals and GPIO
PLL
ATA 3-state Control
Internal Control Logic
ATA Interface
Control Signals
Control
ATA
Interface
Logic
USB
VBUS
D+
D-
USB 2.0
Tranceiver
CY Smart USB
FS/HS Engine
Applications
The CY7C68300C/301C and CY7C68320C/321A implement
a USB 2.0 bridge for all ATA/ATAPI-6 compliant mass storage
devices, such as the following:
4 kByte FIFO
Data
16 Bit ATA Data
■
ATA/ATAPI master only
■
ATA/ATAPI slave only
■
ATA/ATAPI master and ATA/ATAPI slave
■
CompactFlash only
■
ATA/ATAPI slave and CompactFlash or other removable IDE
master
■
Hard drives
■
CD-ROM, CD-R/W
■
DVD-ROM, DVD-RAM, DVD±R/W
Additional Resources
■
MP3 players
■
CY4615C EZ-USB AT2LP Reference Design Kit
■
Personal media players
■
USB Specification version 2.0
■
CompactFlash
■
ATA Specification T13/1410D Rev 3B
■
Microdrives
■
■
Tape drives
■
Personal video recorders
USB Mass Storage Class Bulk Only Transport Specification
http://www.usb.org/developers/devclass_docs/usbmassbulk_10.pdf
The CY7C68300C/301C and CY7C68320C/321A support one
or two devices in the following configurations:
Document 001-05809 Rev. *C
Page 2 of 41
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CY7C68300C, CY7C68301C
CY7C68320C, CY7C68321C
Introduction
The EZ-USB AT2LP™ (CY7C68300C/CY7C68301C and
CY7C68320C/CY7C68321C) implements a fixed-function
bridge between one USB port and one or two ATA- or
ATAPI-based mass storage device ports. This bridge adheres to
the Mass Storage Class Bulk-Only Transport Specification (BOT)
and is intended for bus and self powered devices.
The AT2LP is the latest addition to the Cypress USB mass
storage portfolio, and is an ideal cost- and power-reduction path
for designs that previously used Cypress’s ISD-300A1,
ISD-300LP, or EZ-USB AT2.
Specifically, the CY7C68300C/CY7C68301C includes a mode
that makes it pin-for-pin compatible with the EZ-USB AT2
(CY7C68300A).
The
USB
port
of
the
CY7C68300C/301C
and
CY7C68320C/321A (AT2LP) are connected to a host computer
directly or with the downstream port of a USB hub. Software on
the USB host system issues commands and sends data to the
AT2LP and receives status and data from the AT2LP using
standard USB protocol.
The ATA/ATAPI port of the AT2LP is connected to one or two
mass storage devices. A 4 KB buffer maximizes ATA/ATAPI data
transfer rates by minimizing losses due to device seek times. The
ATA interface supports ATA PIO modes 0, 3, and 4, multiword
DMA mode 2, and Ultra DMA modes 2, 3, and 4.
The device initialization process is configurable, enabling the
AT2LP to initialize ATA/ATAPI devices without software intervention.
CY7C68300A Compatibility
As mentioned in the previous section, the CY7C68300C/301C
contains a backward compatibility mode that enables it to be
used in existing EZ-USB AT2 (CY7C68300A) designs. The
backward compatibility mode is enabled by programming the
EEPROM with the CY7C68300A signature.
During startup, the AT2LP checks the I2C™ bus for an EEPROM
with a valid signature in the first two bytes. If the signature is
0x4D4D, the AT2LP configures itself for pin-to-pin compatibility
with the AT2 and begins normal mass storage operation. If the
Document 001-05809 Rev. *C
signature is 0x534B, the AT2LP configures itself with the AT2LP
pinout and begins normal mass storage operation.
Refer to the logic flow in Figure 1 for more information on the
pinout selection process.
Most designs that use the AT2 can migrate to the AT2LP with no
changes to either the board layout or EEPROM data. Cypress
has published an application note focused on migrating from the
AT2 to the AT2LP to help expedite the process. It can be
downloaded from the Cypress website (http://www.cypress.com)
or obtained through a Cypress representative.
Figure 1. Simplified Pinout Selection Flowchart
Read EEPROM
EEPROM
Signature
0x4D4D?
No
Yes
Set
EZ-USB AT2
(CY7C68300A)
Pinout
Set
EZ-USB AT2LP
(CY7C68300B)
Pinout
Normal Operation
Page 3 of 41
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CY7C68300C, CY7C68301C
CY7C68320C, CY7C68321C
Pin Diagrams
The AT2LP is available in different package types to meet a variety of design needs. The CY7C68320C/321C is available in 56-pin
QFN and 100-pin TQFP packages to provide the greatest flexibility for new designs. The CY7C68300C/301C is available in 56-pin
SSOP and QFN package types to ensure backward compatibility with CY7C68300A designs.
Figure 2. 56-Pin SSOP Pinout (CY7C68300C/CY7C68301C only)
1
DD13
DD12
56
2
DD14
DD11
55
3
DD15
DD10
54
4
GND
DD9
53
5
ATAPUEN (GND)
DD8
52
6
VCC
( ATA_EN ) VBUS_ ATA_ENABLE
51
7
GND
VCC
50
8
IORDY
RESET#
49
GND
48
ARESET#
47
( VBUS_ PWR_ VALID ) DA2
46
CS1#
45
9
DMARQ
10
AVCC
11
XTALOUT
12
XTALIN
13
AGND
14
VCC
15
CS0#
44
(DA2 ) DRVPWRVLD
43
DPLUS
DA1
42
16
DMINUS
DA0
41
17
GND
INTRQ
40
18
VCC
VCC
39
19
GND
DMACK #
38
20
PWR500 # ( PU 10K)
DIOR #
37
21
GND (Reserved )
DIOW #
36
22
SCL
GND
35
23
SDA
VCC
34
24
VCC
GND
33
25
DD0
DD7
32
26
DD1
DD6
31
27
DD2
DD5
30
28
DD3
DD4
29
NOTE: Labels in italics denote pin functionality
during CY7C68300A compatibility mode.
Document 001-05809 Rev. *C
Page 4 of 41
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CY7C68300C, CY7C68301C
CY7C68320C, CY7C68321C
DD13
DD12
DD11
DD10
DD9
50
49
48
47
46
VCC
DD14
51
43
DD15
52
DD8
GND
53
VBUS_ATA_ENABLE (ATA_EN)
ATAPUEN (NC)
54
44
VCC
55
45
GND
56
Figure 3. 56-Pin QFN Pinout (CY7C68300C/CY7C68301C)
IORDY
1
42
RESET#
DMARQ
2
41
GND
AVCC
3
40
ARESET#
XTALOUT
4
39
DA2 (VBUS_PWR_VALID)
XTALIN
5
38
CS1#
AGND
6
37
CS0#
VCC
7
36
DRVPWRVLD (DA2)
DPLUS
8
35
DA1
DMINUS
9
34
DA0
GND
10
33
INTRQ
VCC
11
32
VCC
GND
12
31
DMACK#
(PU10K) PWR500#
13
30
DIOR#
29
DIOW#
GND
14
Document 001-05809 Rev. *C
15
16
17
18
19
20
21
22
23
24
25
26
27
28
SCL
SDA
VCC
DD0
DD1
DD2
DD3
DD4
DD5
DD6
DD7
GND
VCC
GND
NOTE: Italic labels denote pin functionality
during CY7C68300A compatibility mode.
Page 5 of 41
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CY7C68300C, CY7C68301C
CY7C68320C, CY7C68321C
Figure 4. 56-Pin SSOP Pinout (CY7C68320C/CY7C68321C)
Document 001-05809 Rev. *C
1
DD13
DD12
56
2
DD14
DD11
55
3
DD15
DD10
54
4
GND
DD9
53
5
GPIO2
DD8
52
6
VCC
VBUS_ATA_ENABLE
51
7
GND
8
IORDY
VCC
50
RESET#
49
GND
48
ARESET#
47
DA2
46
XTALIN
CS1#
45
AGND
CS0#
44
GPIO0
43
DA1
42
DA0
41
GND
INTRQ
40
VCC
VCC
39
19
GND
DMACK#
38
20
GPIO1
DIOR#
37
21
GND
DIOW#
36
22
SCL
GND
35
23
SDA
VCC
34
24
VCC
GND
33
25
DD0
DD7
32
26
DD1
DD6
31
27
DD2
DD5
30
28
DD3
DD4
29
9
DMARQ
10
AVCC
11
XTALOUT
12
13
14
VCC
15
DPLUS
16
DMINUS
17
18
Page 6 of 41
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CY7C68300C, CY7C68301C
CY7C68320C, CY7C68321C
GND
VCC
GPIO2
GND
DD15
DD14
DD13
DD12
DD11
DD10
DD9
DD8
VBUS_ATA_ENABLE
VCC
56
55
54
53
52
51
50
49
48
47
46
45
44
43
Figure 5. 56-Pin QFN Pinout (CY7C68320C/CY7C68321C)
IORDY
1
42
RESET#
DMARQ
2
41
GND
AVCC
3
40
ARESET#
XTALOUT
4
39
DA2
XTALIN
5
38
CS1#
AGND
6
37
CS0#
VCC
7
36
GPIO0
DPLUS
8
35
DA1
DMINUS
9
34
DA0
GND
10
33
INTRQ
Document 001-05809 Rev. *C
20
21
22
23
24
25
26
27
28
DD3
DD4
DD5
DD6
DD7
GND
VCC
GND
DIOW#
DD2
29
19
14
18
GND
DD1
DIOR#
DD0
30
17
13
VCC
DMACK#
GPIO1
16
VCC
31
15
32
12
SCL
11
SDA
VCC
GND
Page 7 of 41
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CY7C68300C, CY7C68301C
CY7C68320C, CY7C68321C
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
DD8
VBUS_ATA_ENABLE
VCC
RESET#
NC
GND
ARESET#
DA2
CS1#
CS0#
DRVPWRVLD
DA1
DA0
INTRQ
VCC
GND
NC
NC
VBUSPWRD
NC
NC
NC
LOWPWR#
NC
DMACK#
DIOR#
DIOW#
VCC
NC
NC
VCC
GND
IORDY
DMARQ
GND
GND
GND
GND
AVCC
XTALOUT
XTALIN
AGND
NC
NC
NC
VCC
DPLUS
DMINUS
GND
VCC
GND
SYSIRQ
GND
GND
GND
PWR500#
GND
NC
SCL
SDA
80
79
78
77
76
75
74
73
72
71
70
69
68
67
66
65
64
63
62
61
60
59
58
57
56
55
54
53
52
51
Document 001-05809 Rev. *C
50
49
48
47
46
45
44
43
42
41
40
39
38
37
36
35
34
33
32
31
NC
NC
VCC
DD0
DD1
DD2
DD3
VCC
GND
NC
GND
NC
GND
DD4
DD5
DD6
DD7
GND
VCC
GND
30
ATAPUEN
GND
DD15
DD14
DD13
DD12
GND
GPIO5
GPIO4
GPIO3
GPIO2
GPIO1
GPIO0
NC
NC
VCC
GND
DD11
DD10
DD9
100
Figure 6. 100-Pin TQFP Pinout (CY7C68320C/CY7C68321C only)
Page 8 of 41
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CY7C68300C, CY7C68301C
CY7C68320C, CY7C68321C
Pin Descriptions
The following table lists the pinouts for the 56-pin SSOP, 56-pin QFN, and 100-pin TQFP package options for the AT2LP. Refer to the
“Pin Diagrams” on page 4 for differences between the 68300C/01C and 68320C/321C pinouts for the 56-pin packages. For information
on the CY7C68300A pinout, refer to the CY7C68300A data sheet that is found in the ’EZ-USB AT2’ folder of the CY4615C reference
design kit CD.
Table 1. AT2LP Pin Descriptions
Note: (Italic pin names denote pin functionality during CY7C68300A compatibility mode)
100
TQFP
56
QFN
56
SSOP
Pin Name
Pin Default State
Type
at Startup
1
55
6
VCC
PWR
2
56
7
GND
GND
3
1
8
IORDY
I[1]
Input
ATA control. Apply a 1k pull up to 3.3V.
I[1]
Input
ATA control.
Pin Description
VCC. Connect to 3.3V power source.
Ground.
4
2
9
DMARQ
5
6
7
8
N/A
N/A
GND
9
3
10
AVCC
PWR
10
4
11
XTALOUT
Xtal
Xtal
24 MHz crystal output. (See “XTALIN, XTALOUT” on
page 12).
11
5
12
XTALIN
Xtal
Xtal
24 MHz crystal input. (See “XTALIN, XTALOUT” on
page 12).
12
6
13
AGND
GND
13
14
15
N/A
N/A
NC
16
7
14
VCC
PWR
17
8
15
DPLUS
I/O
Hi-Z
USB D+ signal (See “DPLUS, DMINUS” on page 12).
18
9
16
DMINUS
I/O
Hi-Z
USB D–signal (See “DPLUS, DMINUS” on page 12).
19
10
17
GND
GND
Ground.
20
11
18
VCC
PWR
VCC. Connect to 3.3V power source.
21
12
19
GND
GND
Ground.
22
N/A
N/A
SYSIRQ
I
23
24
25
N/A
N/A
GND
GND
26[3]
13[3]
20
PWR500#[2]
(PU 10K)
O
27
14
21
GND (RESERVED)
Ground.
Analog VCC. Connect to VCC through the shortest path
possible.
Analog ground. Connect to ground with as short a
path as possible.
No connect.
VCC. Connect to 3.3V power source.
Input
USB interrupt request. (See “SYSIRQ” on page 13).
Active HIGH. Connect to GND if functionality is not
used.
Ground.
bMaxPower request granted indicator. (See
“PWR500#” on page 14). Active LOW.
N/A for CY7C68320C/CY7C68321C 56-pin packages.
Reserved. Tie to GND.
Notes
1. If byte 8, bit 4 of the EEPROM is set to ‘0’, the ATA interface pins are only active when VBUS_ATA_EN is asserted. See “VBUS_ATA_ENABLE” on page 14.
2. A ‘#’ sign after the pin name indicates that it is active LOW.
3. The General Purpose inputs can be enabled on ATAPUEN, PWR500#, and DRVPWRVLD via EEPROM byte 8, bit 7 on CY7C68320C/CY7C68321C.
Document 001-05809 Rev. *C
Page 9 of 41
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CY7C68300C, CY7C68301C
CY7C68320C, CY7C68321C
Table 1. AT2LP Pin Descriptions
Note: (Italic pin names denote pin functionality during CY7C68300A compatibility mode) (continued)
100
TQFP
56
QFN
56
SSOP
28
N/A
N/A
NC
29
15
22
SCL
O
30
16
23
SDA
I/O
31
32
N/A
N/A
NC
33
17
24
VCC
PWR
[1]
Pin Name
Pin Default State
Type
at Startup
Pin Description
No connect.
Active for Clock signal for I2C interface. (See “SCL, SDA” on
several ms at page 12). Apply a 2.2k pull up resistor.
startup.
Data signal for I2C interface. (See “SCL, SDA” on
page 12).
Apply a 2.2k pull up resistor.
No connect.
VCC. Connect to 3.3V power source.
34
18
25
DD0
I/O
Hi-Z
ATA data bit 0.
35
19
26
DD1
I/O[1]
Hi-Z
ATA data bit 1.
Hi-Z
ATA data bit 2.
Hi-Z
ATA data bit 3.
36
20
27
DD2
I/O[1]
37
21
28
DD3
I/O[1]
38
N/A
N/A
VCC
PWR
VCC. Connect to 3.3V power source.
39
N/A
N/A
GND
GND
Ground.
40
N/A
N/A
NC
NC
41
N/A
N/A
GND
42
N/A
N/A
NC
43
N/A
N/A
GND
No connect.
Ground.
NC
No connect.
Ground.
44
22
29
DD4
I/O[1]
Hi-Z
ATA data bit 4.
45
23
30
DD5
I/O[1]
Hi-Z
ATA data bit 5.
Hi-Z
ATA data bit 6.
Hi-Z
ATA data bit 7. Apply a 1k pull down to GND.
46
24
31
DD6
I/O[1]
47
25
32
DD7
I/O[1]
48
26
33
GND
GND
Ground.
49
27
34
VCC
PWR
VCC. Connect to 3.3V power source.
Ground.
50
28
35
GND
GND
51
52
N/A
N/A
NC
NC
53
N/A
N/A
VCC
No connect.
PWR
[2]
O/Z
VCC. Connect to 3.3V power source.
54
29
36
55
30
37
DIOR#
O/Z[1] Driven HIGH ATA control.
(CMOS)
56
31
38
DMACK#
O/Z[1] Driven HIGH ATA control.
(CMOS)
57
N/A
N/A
NC
NC
58
N/A
N/A
LOWPWR#
O
59
60
61
N/A
N/A
NC
NC
62
N/A
N/A
VBUSPWRD
I
Document 001-05809 Rev. *C
DIOW#
[1]
Driven HIGH ATA control.
(CMOS)
No connect.
USB suspend indicator. (See “LOWPWR#” on
page 14).
No connect.
Input
Bus powered mode selector. (See “VBUSPWRD” on
page 14).
Page 10 of 41
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CY7C68300C, CY7C68301C
CY7C68320C, CY7C68321C
Table 1. AT2LP Pin Descriptions
Note: (Italic pin names denote pin functionality during CY7C68300A compatibility mode) (continued)
100
TQFP
56
QFN
56
SSOP
Pin Name
Pin Default State
Type
at Startup
63
64
N/A
N/A
NC
65
N/A
N/A
GND
GND
Ground.
66
32
39
VCC
PWR
VCC. Connect to 3.3V power source.
[1]
NC
I
Pin Description
No connect.
67
33
40
INTRQ
68
34
41
DA0
O/Z[1] Driven HIGH ATA address.
after 2 ms
delay
69
35
42
DA1
O/Z[1] Driven HIGH ATA address.
after 2 ms
delay
70[3]
36[3]
43
DRVPWRVLD
(DA2)
71
37
44
CS0#
O/Z[1] Driven HIGH ATA chip select.
after 2 ms
delay
72
38
45
CS1#
O/Z[1] Driven HIGH ATA chip select.
after 2 ms
delay
73
39
46
74
40
47
ARESET#
O/Z[1]
ATA reset.
75
41
48
GND
GND
Ground.
76
N/A
N/A
NC
NC
77
42
49
RESET#
I
78
43
50
VCC
PWR
79
44
51
VBUS_ATA_ENABLE
(ATA_EN)
I
Input
VBUS detection (See “VBUS_ATA_ENABLE” on
page 14).
80
45
52
DD8
I/O[1]
Hi-Z
ATA data bit 8.
I
Input
Input
ATA interrupt request.
Device presence detect. (See “DRVPWRVLD” on
page 14). Configurable logical polarity is controlled by
EEPROM address 0x08. This pin must be pulled HIGH
if functionality is not utilized.
Alternate function. Input when the EEPROM configuration byte 8 has bit 7 set to one. The input value is
reported through EP1IN (byte 0, bit 0).
DA2
O/Z[1] Driven HIGH ATA address.
(VBUS_PWR_VALID)
after 2 ms
delay
No connect.
Input
Chip reset (See “RESET#” on page 15).
VCC. Connect to 3.3V power source.
81
46
53
DD9
I/O[1]
Hi-Z
ATA data bit 9.
82
47
54
DD10
I/O[1]
Hi-Z
ATA data bit 10.
I/O[1]
Hi-Z
ATA data bit 11.
83
48
55
DD11
84
N/A
N/A
GND
85
N/A
N/A
VCC
PWR
86
87
N/A
N/A
NC
NC
88
89
90
91
92
93
36[3]
13[3]
54[3]
N/A
GPIO0
GPIO1
GPIO2
GPIO3
GPIO4
GPIO5
I/O[3]
Document 001-05809 Rev. *C
Ground.
VCC. Connect to 3.3V power source.
No connect.
General purpose I/O pins (See “GPIO Pins” on
page 14). The GPIO pins must be tied to GND if
functionality is not used.
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Table 1. AT2LP Pin Descriptions
Note: (Italic pin names denote pin functionality during CY7C68300A compatibility mode) (continued)
100
TQFP
56
QFN
56
SSOP
Pin Default State
Type
at Startup
94
N/A
N/A
GND
GND
95
49
56
DD12
I/O[1]
Hi-Z
ATA data bit 12.
[1]
Pin Name
Pin Description
Ground.
96
50
1
DD13
I/O
Hi-Z
ATA data bit 13.
97
51
2
DD14
I/O[1]
Hi-Z
ATA data bit 14.
[1]
Hi-Z
ATA data bit 15.
98
52
3
DD15
I/O
99
53
4
GND
GND
5
ATAPUEN
(NC)
I/O
100
[3]
54
[3]
Ground.
Bus-powered ATA pull up voltage source (see
“ATAPUEN” on page 14).
Alternate function: General purpose input when the
EEPROM configuration byte 8 has bit 7 set to ‘1’. The
input value is reported through EP1IN (byte 0, bit 2).
Additional Pin Descriptions
XTALIN, XTALOUT
The following sections provide additional pin information.
DPLUS, DMINUS
DPLUS and DMINUS are the USB signaling pins; they must
be tied to the D+ and D– pins of the USB connector. Because
they operate at high frequencies, the USB signals require
special consideration when designing the layout of the PCB.
See “General PCB Layout Recommendations for USB Mass
Storage Designs” on page 39 for PCB layout recommendations.
When RESET# is released, the assertion of the internal pull
up on D+ is gated by a combination of the state of the
VBUS_ATA_ENABLE pin, the value of configuration address
0x08 bit 0 (DRVPWRVLD Enable), and the detection of a
non-removable ATA/ATAPI drive on the IDE bus. See Table 2
for a description of this relationship.
VBUS_ATA_EN
1
1
1
1
0
0
DRVPWRVLD Enable Bit
1
1
0
0
1
1
Yes
No
Yes
No
Yes
No
1
1
1
0
0
0
State of D+ pull up
Figure 7. XTALIN/XTALOUT Diagram
24MHz Xtal
12pF
Table 2. D+ Pull Up Assertion Dependencies
ATA/ATAPI Drive Detected
The AT2LP requires a 24 MHz (±100 ppm) signal to derive
internal timing. Typically, a 24 MHz (12 pF, 500 μW,
parallel-resonant, fundamental mode) crystal is used, but a
24 MHz square wave (3.3V, 50/50 duty cycle) from another
source can also be used. If a crystal is used, connect its pins
to XTALIN and XTALOUT, and also through 12 pF capacitors
to GND as shown in Figure 7. If an alternate clock source is
used, apply it to XTALIN and leave XTALOUT unconnected.
SCL, SDA
12pF
XTALIN
XTALOUT
The clock and data pins for the I2C port must be connected to
the configuration EEPROM and to 2.2K pull up resistors tied
to VCC. If no EEPROM is used in the design, the SCL and SDA
pins must still be connected to pull up resistors. The SCL and
SDA pins are active for several milliseconds at startup.
Document 001-05809 Rev. *C
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SYSIRQ
The SYSIRQ pin provides a way for systems to request service
from host software by using the USB Interrupt pipe on endpoint
1 (EP1). If the AT2LP has no pending interrupt data to return,
USB interrupt pipe data requests are NAKed. If pending data is
available, the AT2LP returns 16 bits of data. This data indicates
whether AT2LP is operating in high speed or full speed, whether
the AT2LP is reporting self-powered or bus-powered operation,
and the states of any GPIO pins that are configured as inputs.
GPIO pins can be individually set as inputs or outputs, with byte
0x09 of the configuration data. The state of any GPIO pin that is
not set as an input is reported as ‘0’ in the EP1 data.
Table 3 gives the bitmap for the data returned on the interrupt
pipe and Figure 8 depicts the latching algorithm incorporated by
the AT2LP.
The SYSIRQ pin must be pulled LOW if HID functionality is used.
Refer to “HID Functions for Button Controls” on page 15 for more
details on HID functionality.
Table 3. Interrupt Data Bitmap
5
4
3
2
1
0
GPIO[0]
RESERVED
6
GPIO[1]
RESERVED
7
GPIO[2]
RESERVED
0
GPIO[3]
RESERVED
1
GPIO[4]
2
GPIO[5]
3
RESERVED
4
RESERVED
5
VBUS Powered
6
USB High Speed
7
RESERVED
EP1 Data Byte 0
RESERVED
EP1 Data Byte 1
Figure 8. SYSIRQ Latching Algorithm
No
No
USB Interrupt
Pipe Polled?
SYSIRQ=1?
Yes
Yes
Yes
Int_Data = 1?
Latch State of IO Pins
Set Int_Data = 1
No
No
NAK Request
Yes
Int_Data = 0
and
SYSIRQ=0?
Return Interrupt Data
Set Int_Data = 0
Document 001-05809 Rev. *C
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DRVPWRVLD
When this pin is enabled with bit 0 of configuration address 0x08
(DRVPWRVLD Enable), the AT2LP informs the host that a
removable device, such as a CF card, is present. The AT2LP
uses DRVPWRVLD to detect that the removable device is
present. Pin polarity is controlled by bit 1 of configuration
address 0x08. When DRVPWRVLD is deasserted, the AT2LP
reports a “no media present” status (ASC = 0x3A, ASQ = 0x00)
when queried by the host. When the media has been detected
again, the AT2LP reports a “media changed” status to the host
(ASC = 0x28, ASQ = 0x00) when queried.
When a removable device is used, it is always considered by the
AT2LP to be the IDE master device. Only one removable device
may be attached to the AT2LP. If the system only contains a
removable device, bit 6 of configuration address 0x08 (Search
ATA Bus) must be set to ‘0’ to disable ATA device detection at
startup. If a non-removable device is connected in addition to a
removable media device, the non-removable device must be
configured as IDE slave (device address 1).
AT2LP releases the pull up on D+ as required by the USB specification.
Also, if bit 4 of configuration address 0x08 is ‘1’, the ATA interface
pins are placed in a Hi-Z state when VBUS_ATA_ENABLE is ‘0’.
If bit 4 of configuration address 0x08 is ‘0’, the ATA interface pins
are still driven when VBUS_ATA_ENABLE is ‘0’.
ATAPUEN
This output can be used to control the required host pull up
resistors on the ATA interface in a bus-powered design to
minimize unnecessary power consumption when the AT2LP is in
suspend. ATAPUEN is driven to ‘0’ when the ATA bus is inactive.
ATAPUEN is driven to ‘1’ when the ATA bus is active. ATAPUEN
is set to a Hi-Z state along with all other ATA interface pins if
VBUS_ATA_ENABLE is deasserted and the ATA_EN functionality (bit 4 of configuration address 0x08) is enabled (0).
ATAPUEN can also be configured as a GPIO input. See “HID
Functions for Button Controls” on page 15 for more information
on HID functionality.
GPIO Pins
PWR500#
The GPIO pins enable a general purpose input and output
interface. There are several different interfaces to the GPIO pins:
■
Configuration bytes 0x09 and 0x0A contain the default settings
for the GPIO pins upon initial AT2LP configuration.
■
The host can modify the settings of the GPIO pins during
operation. This is done with vendor-specific commands
described in “Programming the EEPROM” on page 34.
The AT2LP asserts PWR500# to indicate that VBUS current may
be drawn up to the limit specified by the bMaxPower field of the
USB configuration descriptors. If the AT2LP enters a low-power
state, PWR500# is deasserted. When normal operation is
resumed, PWR500# is restored. The PWR500# pin must never
be used to control power sources for the AT2LP. In the 56-pin
package, PWR500# only functions during bus-powered
operation.
■
The status of the GPIO pins is returned on the interrupt endpoint
(EP1) in response to a SYSIRQ. See “SYSIRQ” on page 13 for
SYSIRQ details.
PWR500# can also be configured as a GPIO input. See “HID
Functions for Button Controls” on page 15 for more information
on HID functionality.
LOWPWR#
VBUSPWRD
LOWPWR# is an output pin that is driven to ‘0’ when the AT2LP
is not in suspend. LOWPWR# is placed in Hi-Z when the AT2LP
is in a suspend state. This pin only indicates the state of the
AT2LP and must not be used to determine the status of the USB
host because of variations in the behavior of different hosts.
VBUSPWRD is used to indicate self- or bus-powered operation.
Some designs require the ability to operate in either self- or
bus-powered modes. The VBUSPWRD input pin enables these
devices to switch between self-powered and bus-powered
modes by changing the contents of the bMaxPower field and the
self-powered bit in the reported configuration descriptors (see
Table 4).
ATA Interface Pins
The ATA Interface pins must be connected to the corresponding
pins on an IDE connector or mass storage device. To enable
sharing of the IDE bus with other master devices, the AT2LP can
place all ATA Interface Pins in a Hi-Z state whenever
VBUS_ATA_ENABLE is not asserted. Enabling this feature is
done by setting bit 4 of configuration address 0x08 to ‘1’.
Otherwise, the ATA bus is driven by the AT2LP to a default
inactive state whenever VBUS_ATA_ENABLE is not asserted.
Design practices for signal integrity as outlined in the
ATA/ATAPI-6 specification must be followed with systems that
utilize a ribbon cable interconnect between the AT2LP’s ATA
interface and the attached mass storage device, especially if
Ultra DMA Mode is used.
VBUS_ATA_ENABLE
VBUS_ATA_ENABLE is typically used to indicate to the AT2LP
that power is present on VBUS. This pin is polled by the AT2LP
at startup and then every 20 ms thereafter. If this pin is ‘0’, the
Document 001-05809 Rev. *C
Note that current USB host drivers do not poll the device for this
information, so the effect of this pin is only seen on a USB or
power on reset.
Table 4. Behavior of Descriptor Data that is Dependent Upon
VBUSPWRD State
VBUSPWRD = ‘0’ VBUSPWRD
N/A (56-pin)
Pin
VBUSPWRD = ‘1’
bMaxPower
Reported
Value
0xFA
(500 mA)
0x01
(2 mA)
The value
from configuration
address 0x34
is used.
bmAttributes
bit 6
Reported
Value
‘0’
(bus-powered)
‘1’
(self-powered)
‘0’ if
bMaxPower >
0x01
‘1’ if
bMaxPower ≤
0x01
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RESET#
HID Functions for Button Controls
Asserting RESET# for 10 ms resets the entire AT2LP. In
self-powered designs, this pin is normally tied to VCC through a
100k resistor, and to GND through a 0.1 μF capacitor, as shown
in Figure 9.
Cypress’s CY7C68320C/CY7C68321C has the capability of
supporting Human Interface Device (HID) signaling to the host.
Cypress does not recommend an RC reset circuit for
bus-powered devices because of the potential for VBUS voltage
drop, which may result in a startup time that exceeds the USB
limit. Refer to the application note titled EZ-USB
FX2™/AT2™/SX2™ Reset and Power Considerations, at
www.cypress.com, for more information.
While the AT2LP is in reset, all pins are held at their default
startup state.
Figure 9. R/C Reset Circuit for Self-Powered Designs
If there is a HID descriptor in the configuration data, the GPIO
pins that are set as inputs are polled by the AT2LP logic approximately every 17 ms (depending on other internal interrupt
routines). If a change is detected in the state of any HID-enabled
GPIO, an HID report is sent through EP1 to the host. The report
format for byte 0 and byte 1 are shown in Table 5.
The ability to add buttons to a mass storage solution opens new
applications for data backup and other device-side notification to
the host. The AT2LP Blaster software, found in the CY4615C
files, provides an easy way to enable and modify the HID
features of the AT2LP.
GPIO pins can be individually set as inputs or outputs, with byte
0x09 of the configuration data, enabling a mix of HID and general
purpose outputs. GPIOs that are not configured as inputs are
reported with a value of ‘0’ in the HID data. The RESERVED bits’
values must be ignored, and Cypress recommends using a
bitmask in software to filter out unused HID data.
100KΩ
RESET#
Note that if using the 56-pin package, the reported GPIO[5:3]
values must be ignored because the pins are not actually
present.
0.1μF
Table 5. HID Data Bitmap
4
3
2
1
0
7
6
5
4
3
2
1
RESERVED
RESERVED
RESERVED
RESERVED
USB High Speed
VBUS Powered
RESERVED
RESERVED
GPIO[5]
GPIO[4]
GPIO[3]
GPIO[2]
GPIO[1]
0
GPIO[0]
5
RESERVED
USB Interrupt Data Byte 0
6
RESERVED
USB Interrupt Data Byte 1
7
Functional Overview
USB Signaling Speed
Additionally, the AT2LP translates ATAPI SFF-8070i commands
to ATA commands for seamless integration of ATA devices with
generic Mass Storage Class BOT drivers.
AT2LP operates at the following two rates defined in the USB
Specification Revision 2.0 dated April 27, 2000:
ATA Command Block (ATACB)
Chip functionally is described in the subsequent sections.
■
Full speed, with a signaling bit rate of 12 Mbits/sec.
■
High speed, with a signaling bit rate of 480 Mbits/sec.
AT2LP does not operate at the low-speed signaling rate of 1.5
Mbits/sec.
ATA Interface
The ATA/ATAPI port on the AT2LP is compatible with the Information Technology–AT Attachment with Packet Interface–6
(ATA/ATAPI-6) Specification, T13/1410D Rev 2a. The AT2LP
supports both ATAPI packet commands as well as ATA
commands (by use of ATA Command Blocks), as outlined in
“ATA Command Block (ATACB)” on page 15. Refer to the USB
Mass Storage Class (MSC) Bulk Only Transport (BOT) Specification for information on Command Block formatting.
Document 001-05809 Rev. *C
The ATA Command Block (ATACB) functionality provides a
means of passing ATA commands and ATA register accesses to
the attached device for execution. ATACB commands are transferred in the Command Block Wrapper Command Block
(CBWCB) portion of the Command Block Wrapper (CBW). The
ATACB is distinguished from other command blocks by having
the first two bytes of the command block match the bVSCBSignature and bVSCBSubCommand values that are defined in
Table 6. Only command blocks that have a valid bVSCBSignature and bVSCBSubCommand are interpreted as ATA
Command Blocks. All other fields of the CBW and restrictions on
the CBWCB remain as defined in the USB Mass Storage Class
Bulk-Only Transport Specification. The ATACB must be 16 bytes
in length. The following table and text defines the fields of the
ATACB.
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Table 6. ATACB Field Descriptions
Byte
Field Name
Field Description
0
bVSCBSignature
This field indicates to the CY7C68300C/CY7C68301C that the ATACB
contains a vendor-specific command block. This value of this field must match
the value in EEPROM address 0x04 for the command to be recognized as a
vendor-specific ATACB command.
1
bVSCBSubCommand
This field must be set to 0x24 for ATACB commands.
2
bmATACBActionSelect
This field controls the execution of the ATACB according to the bitfield values:
Bit 7 IdentifyPacketDevice – This bit indicates that the data phase of the
command contains ATAPI (0xA1) or ATA (0xEC) IDENTIFY device data.
Setting IdentifyPacketDevice when the data phase does not contain IDENTIFY
device data results in unspecified device behavior.
0 = Data phase does not contain IDENTIFY device data
1 = Data phase contains ATAPI or ATA IDENTIFY device data
Bit 6 UDMACommand – This bit enables supported UDMA device transfers.
Setting this bit when a non-UDMA capable device is attached results in
undetermined behavior.
0 = Do not use UDMA device transfers (only use PIO mode)
1 = Use UDMA device transfers
Bit 5 DEVOverride – This bit determines whether the DEV bit value is taken
from the value assigned to the LUN during startup or from the ATACB.
0 = The DEV bit is taken from the value assigned to the LUN during startup
1 = The DEV bit is taken from the ATACB field 0x0B, bit 4
Bit 4 DErrorOverride – This bit controls the device error override feature. This
bit must not be set during a bmATACBActionSelect TaskFileRead.
0 = Data accesses are halted if a device error is detected
1 = Data accesses are not halted if a device error is detected
Bit 3 PErrorOverride – This bit controls the phase error override feature. This
bit must not be set during a bmATACBActionSelect TaskFileRead.
0 = Data accesses are halted if a phase error is detected
1 = Data accesses are not halted if a phase error is detected
Bit 2 PollAltStatOverride – This bit determines whether or not the Alternate
Status register is polled and the BSY bit is used to qualify the ATACB operation.
0 = The AltStat register is polled until BSY=0 before proceeding with the ATACB
operation
1 = The ATACB operation is executed without polling the AltStat register.
Bit 1 DeviceSelectionOverride – This bit determines when the device selection
is performed in relation to the command register write accesses.
0 = Device selection is performed before command register write accesses
1 = Device selection is performed following command register write accesses
Bit 0 TaskFileRead – This bit determines whether or not the taskfile register
data selected in bmATACBRegisterSelect is returned. If this bit is set, the
dCBWDataTransferLength field must be set to 8.
0 = Execute ATACB command and data transfer (if any)
1 = Only read taskfile registers selected in bmATACBRegisterSelect and return
0x00h for all others. The format of the 8 bytes of returned data is as follows:
❐ Address offset 0x00 (0x3F6) – Alternate Status
❐ Address offset 0x01 (0x1F1) – Features/Error
❐ Address offset 0x02 (0x1F2) – Sector Count
❐ Address offset 0x03 (0x1F3) – Sector Number
❐ Address offset 0x04 (0x1F4) – Cylinder Low
❐ Address offset 0x05 (0x1F5) – Cylinder High
❐ Address offset 0x06 (0x1F6) – Device/Head
❐ Address offset 0x07 (0x1F7) – Command/Status
Document 001-05809 Rev. *C
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Table 6. ATACB Field Descriptions (continued)
Byte
3
Field Name
bmATACBRegisterSelect
Field Description
This field controls which of the taskfile register read or write accesses occur.
Taskfile read data is always 8 bytes in length, and unselected register data are
returned as 0x00. Register accesses occur in sequential order as outlined here
(0 to 7):
Bit 0 (0x3F6) Device Control/Alternate Status
Bit 1 (0x1F1) Features/Error
Bit 2 (0x1F2) Sector Count
Bit 3 (0x1F3) Sector Number
Bit 4 (0x1F4) Cylinder Low
Bit 5 (0x1F5) Cylinder High
Bit 6 (0x1F6) Device/Head
Bit 7 (0x1F7) Command/Status
4
5–12
bATACBTransferBlockCount
This value indicates the maximum requested block size be in 512-byte increments. This value must be set to the last value used for the ’Sectors per block’
in the SET_MULTIPLE_MODE command. Legal values are 0, 1, 2, 4, 8, 16,
32, 64, and 128 where 0 indicates 256 sectors per block. A command failed
status is returned if an illegal value is used in the ATACB.
bATACBTaskFileWriteData
These bytes contain ATA register data used with ATA command or PIO write
operations. Only registers selected in bmATACBRegisterSelect are required to
hold valid data when accessed. The registers are as follows.
ATACB Address Offset 0x05 (0x3F6) – Device Control
ATACB Address Offset 0x06 (0x1F1) – Features
ATACB Address Offset 0x07 (0x1F2) – Sector Count
ATACB Address Offset 0x08 (0x1F3) – Sector Number
ATACB Address Offset 0x09 (0x1F4) – Cylinder Low
ATACB Address Offset 0x0A (0x1F5) – Cylinder High
ATACB Address Offset 0x0B (0x1F6) – Device
ATACB Address Offset 0x0C (0x1F7) – Command
13–15
Reserved
Document 001-05809 Rev. *C
These bytes must be set to 0x00 for ATACB commands.
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Operating Modes
The different modes of operation and EEPROM information are presented in the following sections.
Operational Mode Selection Flow
During the power up sequence, the AT2LP queries the I2C bus for an EEPROM. The AT2LP then selects a pinout configuration as
shown here, and checks to see if ARESET# is configured for Board Manufacturing Test Mode.
■
If no EEPROM is detected, the AT2LP uses the values in the factory-programmable (fused) memory space. See “Fused Memory
Data” on page 19 for more information. This is not a valid mode of operation if no factory programming has been done.
■
If an EEPROM signature of 0x4D4D is found, the CY7C68300C/CY7C68301C uses the same pinout and EEPROM format as the
CY7C68300A (EZ-USB AT2+).
■
If an EEPROM signature of 0x534B is found, the AT2LP uses the values stored in the EEPROM to configure the USB descriptors
for normal operation.
■
If an EEPROM is detected, but an invalid signature is read, the AT2LP defaults into Board Manufacturing Test Mode.
Figure 10. Operational Mode Selection Flow
Check I2C Bus
No
EEPROM
Found?
Yes
No
Signature
0x534B?
Signature
0x4D4D?
Yes
Yes
Set
EZ-USB AT2+
(CY7C68300A)
Pinout
Set
EZ-USB AT2LP
Pinout
VBUS_ATA_ENABLE
Load Fused
Memory Data
(AT2LP Pinout)
No
Pin HIGH?
Yes
ARESET#
Pin LOW?
No
Yes
DD7 Pin Set
HIGH
ARESET#
Pin HIGH?
No
Yes
Board Manufacturing
Test Mode
Document 001-05809 Rev. *C
Normal Mass
Storage Mode
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Fused Memory Data
EEPROM accesses (CfgCB) and one for board level testing
(MfgCB), as described in the following sections.
When no EEPROM is detected at startup, the AT2LP
enumerates with the VID/PID/DID values that are stored in the
fused memory space. These values can be programmed into the
AT2LP during chip manufacturing for high volume applications to
avoid the need for an external EEPROM in some designs.
Contact your local Cypress Semiconductor sales office for more
information on this feature.
There is a convenient method available for starting the AT2LP in
Board Manufacturing Test Mode to enable reprogramming of
EEPROMs without a mass storage device attached. If the ATA
Reset (ARESET#) line is LOW on power up, the AT2LP enters
Board Manufacturing Test Mode. It is recommended that a 10k
resistor be used to pull ARESET# to LOW. An easy way to pull
the ARESET# line LOW is to short pins 1 and 3 on the 40-pin
ATA connector with a 10k resistor, that ties the ARESET# line to
the required pull down on DD7.
If no factory programming has been done, the values returned
from the fused memory space would all be 0x00, which is not a
valid mode of operation. In this case the chip uses the manufacturing mode and return the default descriptors (VID/PID of
0x4B4/0x6830). An EEPROM must be used with designs that do
not use factory-programmed chips in order to identify the device
as your company’s product.
CfgCB
The cfg_load and cfg_read vendor-specific commands are
passed down through the bulk pipe in the CBWCB portion of the
CBW. The format of this CfgCB is shown as follows. Byte 0 is a
vendor-specific command designator whose value is configurable and set in the configuration data (address 0x04). Byte 1
must be set to 0x26 to identify it as a CfgCB command. Byte2 is
reserved and must be set to zero. Byte 3 is used to determine
the memory source to write/read. For the AT2LP, this byte must
be set to 0x02, indicating the EEPROM is present. Bytes 4 and
5 are used to determine the start address, which must always be
0x0000. Bytes 6 through 15 are reserved and must be set to
zero.
Normal Mass Storage Mode
In Normal Mass Storage Mode, the chip behaves as a USB 2.0
to ATA/ATAPI bridge. This includes all typical USB device states
(powered, configured, etc.). The USB descriptors are returned
according to the values stored in the external EEPROM or fused
memory space. A unique serial number is required for Mass
Storage Class Bulk-Only Transport compliance, which is one
reason why an EEPROM or factory-programmed part is needed.
Board Manufacturing Test Mode
The data transferred to the EEPROM must be in the format
specified in Table 11 of this data sheet. Maximum data transfer
size is 255 bytes.
In Board Manufacturing Test Mode the AT2LP behaves as a USB
2.0 device but the ATA/ATAPI interface is not fully active. This
mode must not be used for mass storage operation in a finished
design. In this mode, the AT2LP enable reading from and writing
to the EEPROM, and for board level testing, through vendor
specific ATAPI commands utilizing the CBW Command Block as
described in the USB Mass Storage Class Bulk-Only Transport
Specification. There is a vendor-specific ATAPI command for
The data transfer length is determined by the CBW Data Transfer
Length specified in bytes 8 through 11 (dCBWDataTransferLength) of the CBW (refer to Table 7). The type/direction of the
command is determined by the direction bit specified in byte 12,
bit 7 (bmCBWFlags) of the CBW (refer to Table 7).
Table 7. Command Block Wrapper
Bits
Offset
7
6
5
4
3
0–3
DCBWSignature
4–7
dCBWTag
8–11 (08h–0Bh)
2
1
0
dCBWDataTransferLength
12 (0Ch)
bwCBWFLAGS
Dir
13 (0Dh)
14 (0Eh)
15–30 (0Fh1Eh)
Document 001-05809 Rev. *C
Obsolete
Reserved (0)
Reserved (0)
Reserved (0)
bCBWLUN
bCBWCBLength
CBWCB (CfgCB or MfgCB)
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Table 8. Example CfgCB
Offset
CfgCB Byte Descriptions
Bits
7
6
5
4
3
2
1
0
0
bVSCBSignature (set in configuration bytes)
0
0
1
0
0
1
0
0
1
bVSCBSubCommand (must be 0x26)
0
0
1
0
0
1
1
0
2
Reserved (must be set to zero)
0
0
0
0
0
0
0
0
3
Data Source (must be set to 0x02)
0
0
0
0
0
0
1
0
4
Start Address (LSB) (must be set to zero)
0
0
0
0
0
0
0
0
5
Start Address (MSB) (must be set to zero)
0
0
0
0
0
0
0
0
6–15
Reserved (must be set to zero)
0
0
0
0
0
0
0
0
MfgCB
Mfg_read
The mfg_load and mfg_read vendor-specific commands are
passed down through the bulk pipe in the CBWCB portion of the
CBW. The format of this MfgCB is shown as follows. Byte0 is a
vendor-specific command designator whose value is configurable and set in the AT2LP configuration data. Byte 1 must be
0x27 to identify a MfgCB. Bytes 2 through 15 are reserved and
must be set to zero.
This USB request returns a ’snapshot’ of select AT2LP input
pins. AT2LP input pins not directly associated with USB
operation can be sampled at any time during Manufacturing Test
Mode operation. See Table 10 for an explanation of the
Mfg_read data format. Any data length can be specified, but only
bytes 0 through 3 contain usable information, so a length of 4
bytes is recommended.
The data transfer length is determined by the CBW Data Transfer
Length specified in bytes 8 through 11 (dCBWDataTransferLength) of the CBW. The type and direction of the command is
determined by the direction bit specified in byte 12, bit 7
(bmCBWFlags) of the CBW.
Table 10. Mfg_read and Mfg_load Data Format
Byte
Bits
Read/Load
0
7
R/L
Table 9. Example MfgCB
Offset
MfgCB Byte Description
Bits
6
R
5:4
R/L
DA2
CS#[1:0]
7 6 5 4 3 2 1 0
3
R/L
DRVPWRVLD
2:1
R/L
DA[1:0]
0
0 bVSCBSignature
(set in configuration bytes)
0 0 1 0 0 1 0 0
1
1 bVSCBSubCommand
(hardcoded 0x27)
0 0 1 0 0 1 1 1
1
0
R
INTRQ
7
L
DD[15:0] High-Z Status
0 = Hi-Z all DD pins
1 = Drive DD pins
6
R
MFG_SEL
0 = Mass Storage Mode
1 = Manufacturing Mode
5
R
VBUS_ATA_ENABLE
4
R
DMARQ
3
R
IORDY
2
R/L
DMACK#
1
R/L
DIOR#
2–15 2–15 Reserved (must be zero) 0 0 0 0 0 0 0 0
Mfg_load
During a Mfg_load, the AT2LP enters into Manufacturing Test
Mode. Manufacturing Test Mode is provided as a means to
implement board or system level interconnect tests. During
Manufacturing Test Mode operation, all outputs not directly
associated with USB operation are controllable. Normal control
of the output pins are disabled. Control of the select AT2LP I/O
pins and their tri-state controls are mapped to the ATAPI data
packet associated with this request. (See Table 10 for an explanation of the required Mfg_load data format.) Any data length can
be specified, but only bytes 0 through 3 are mapped to pins, so
a length of 4 bytes is recommended. To exit Manufacturing Test
Mode, a hard reset (toggle RESET#) is required.
Document 001-05809 Rev. *C
Function
ARESET#
0
R/L
DIOW#
2
7:0
R/L
DD[7:0]
3
7:0
R/L
DD[15:8]
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EEPROM Organization
2
The contents of the recommended 256-byte (2048-bit) I C
EEPROM are arranged as follows. In Table 11, the column
labeled ‘Required Contents’ contains the values that must be
used for proper operation of the AT2LP. The column labeled
‘Variable Contents’ contains suggested entries and values that
may vary (such as string lengths) according to the EEPROM
data. Some values, such as the Vendor ID, Product ID and
device serial number, must be customized to meet USB
compliance. The ‘AT2LP Blaster’ tool in the CY4615C kit can be
used to edit and program these values into an AT2LP-based
product (refer to Figure 11). The ‘AT2LP Primer’ tool can be used
to program AT2LP-based products in a manufacturing
environment and provides for serial number randomization. See
“Board Manufacturing Test Mode” on page 19 for details on how
to use vendor-specific ATAPI commands to read and program
the EEPROM.
The address pins on the serial EEPROM must be set such that
the EEPROM is at physical address 2 (A0 = 0, A1 = 1, A2 = 0)
or address 4 (A0 = 0, A1 = 0, A2 = 1) for EEPROM devices that
are internally byte-addressed memories. It is recommended that
the address pins be set this way even on EEPROMs that may
indicate that the address pins are internal no-connects.
Figure 11. Snapshot of ‘AT2LP Blaster’ Utility
Document 001-05809 Rev. *C
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Table 11. Configuration Data Organization
Byte
Address
Configuration
Item Name
Configuration
Item Description
Required
Contents
Variable
Contents
Note Devices running in Backward Compatibility (CY7C68300A) Mode must use the CY7C68300A EEPROM organization, and
not the format shown in this document. Refer to the CY7C68300A data sheet for the CY7C68300A EEPROM format.
AT2LP Configuration
0x00
EEPROM signature byte 0
I2C EEPROM signature byte 0. This byte must be 0x53 for
proper AT2LP pin configuration.
0x53
0x01
EEPROM signature byte 1
I2C EEPROM signature byte 1. This byte must be 0x4B for
proper AT2LP pin configuration.
0x4B
0x02
APM Value
ATA Device Automatic Power Management Value. If an
attached ATA device supports APM and this field contains
other than 0x00, the AT2LP issues a SET_FEATURES
command to Enable APM with this value during the drive
initialization process. Setting APM Value to 0x00 disables
this functionality. This value is ignored with ATAPI devices.
0x00
0x03
Reserved
Must be set to 0x00.
0x00
0x04
bVSCBSignature Value
Value in the first byte of the CBW CB field that designates
that the CB is to be decoded as vendor specific ATA
commands instead of the ATAPI command block. See
“Functional Overview” on page 15 for more detail on how
this byte is used.
0x24
0x05
Reserved
Bits 7:6
0x07
Enable mode page 8
Bit 5
Enable the write caching mode page (page 8). If this page
is enabled, Windows disables write caching by default,
which limits write performance.
0= Disable mode page 8.
1= Enable mode page 8.
Disable wait for INTRQ
Bit 4
Poll status register rather than waiting for INTRQ. Setting
this bit to 1 improves USB BOT test results but may
introduce compatibility problems with some devices.
0 = Wait for INTRQ.
1 = Poll status register instead of using INTRQ.
BUSY Bit Delay
Bit 3
Enable a delay of up to 120 ms at each read of the DRQ bit
where the device data length does not match the host data
length. This enables the CY7C68300C/CY7C68301C to
work with most devices that incorrectly clear the BUSY bit
before a valid status is present.
0 = No BUSY bit delay.
1 = Use BUSY bit delay.
Short Packet Before Stall
Bit 2
Determines if a short packet is sent before the STALL of an
IN endpoint. The USB Mass Storage Class Bulk-Only Specification enables a device to send a short or zero-length IN
packet before returning a STALL handshake for certain
cases. Certain host controller drivers may require a short
packet before STALL.
0 = Do not force a short packet before STALL.
1 = Force a short packet before STALL.
Document 001-05809 Rev. *C
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Table 11. Configuration Data Organization (continued)
Byte
Address
0x06
0x07
Configuration
Item Name
Configuration
Item Description
SRST Enable
Bit 1
Determines if the AT2LP is to do an SRST reset during drive
initialization. At least one reset must be enabled. Do not set
SRST to 0 and Skip Pin Reset to 1 at the same time.
0 = Do not perform SRST during initialization.
1 = Perform SRST during initialization.
Skip Pin Reset
Bit 0
Skip ARESET# assertion. When this bit is set, the AT2LP
bypasses ARESET# during any initialization other than
power up. Do not set SRST Enable to 0 and Skip Pin Reset
to 1 at the same time.
0 = Allow ARESET# assertion for all device resets.
1 = Disable ARESET# assertion except for chip reset cycles.
ATA UDMA Enable
Bit 7
Enable Ultra DMA data transfer support for ATA devices. If
enabled, and if the ATA device reports UDMA support for the
indicated modes, the AT2LP uses UDMA data transfers at
the highest negotiated rate possible.
0 = Disable ATA device UDMA support.
1 = Enable ATA device UDMA support.
ATAPI UDMA Enable
Bit 6
Enable Ultra DMA data transfer support for ATAPI devices.
If enabled, and if the ATAPI device reports UDMA support
for the indicated modes, the AT2LP uses UDMA data
transfers at the highest negotiated rate possible.
0 = Disable ATAPI device UDMA support.
1 = Enable ATAPI device UDMA support.
UDMA Modes
Bits 5:0
These bits select which UDMA modes are enabled. The
AT2LP operates in the highest enabled UDMA mode
supported by the device. The AT2LP supports UDMA modes
2, 3, and 4 only.
Bit 5 = Reserved. Must be set to 0.
Bit 4 = Enable UDMA mode 4.
Bit 3 = Enable UDMA mode 3.
Bit 2 = Enable UDMA mode 2.
Bit 1 = Reserved. Must be set to 0.
Bit 0 = Reserved. Must be set to 0.
Reserved
Bits 7:3
Must be set to 0.
Multi-word DMA mode
Bit 2
This bit enables multi-word DMA support. If this bit is set and
the drive supports it, multi-word DMA is used.
PIO Modes
Bits 1:0
These bits select which PIO modes are enabled. Setting to
‘1’ enables use of that mode with the attached drive, if the
drive supports it. Multiple bits may be set. The AT2LP
operates in the highest enabled PIO mode supported by the
device. The AT2LP supports PIO modes 0, 3, and 4 only.
PIO mode 0 is always enabled and has no corresponding
configuration bit.
Bit 1 = Enable PIO mode 4.
Bit 0 = Enable PIO mode 3.
Document 001-05809 Rev. *C
Required
Contents
Variable
Contents
0xD4
0x07
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Table 11. Configuration Data Organization (continued)
Byte
Address
0x08
Configuration
Item Name
Configuration
Item Description
BUTTON_MODE
Bit 7
Button mode (100-pin package only). Sets ATAPUEN,
PWR500# and DRVPWRVLD to become button inputs
returned on bits 2, 1, and 0 of EP1IN. This bit must be set to
‘0’ if the 56-pin packages are used.
0 = Disable button mode.
1 = Enable button mode.
SEARCH_ATA_BUS
Bit 6
Search ATA bus after RESET to detect non-removable ATA
and ATAPI devices. Systems with only a removable device
(such as CF readers) must set this bit to ‘0’. Systems with at
least one non-removable device must set this bit to ‘1’.
0 = Do not search for ATA devices.
1 = Search for ATA devices.
BIG_PACKAGE
Bit 5
Selects the 100- or 56-pin package pinout configuration.
Using the wrong pinout may result in unpredictable behavior.
0 = Use 56-pin package pinout.
1 = Use 100-pin package pinout.
ATA_EN
Bit 4
Drive ATA bus when AT2LP is in suspend. For designs in
which the ATA bus is shared between the AT2LP and
another ATA master (such as an MP3 player), the AT2LP
can place the ATA interface pins in a Hi-Z state when it
enters suspend. For designs that do not share the ATA bus,
the ATA signals must be driven while the AT2LP is in
suspend to avoid floating signals.
0 = Drive ATA signals when AT2LP is in suspend.
1 = Set ATA signals to Hi-Z when AT2LP is in suspend.
Reserved
Bit 3
Reserved. This bit must be set to ‘0’.
Reserved
Bit 2
Reserved. This bit must be set to ‘0’
Drive Power Valid Polarity
Bit 1
Configure the logical polarity of the DRVPWRVLD input pin.
0 = Active LOW (‘connector ground’ indication)
1 = Active HIGH (power indication from device)
Drive Power Valid Enable
Bit 0
Enable the DRVPWRVLD pin. When this pin is enabled, the
AT2LP enumerates a removable ATA device, such as
CompactFlash or MicroDrive, as the IDE master device.
Enabling this pin also affects other pins related to removable
device operation.
0 = Disable removable ATA device support.
1 = Enable removable ATA device support.
Document 001-05809 Rev. *C
Required
Contents
Variable
Contents
0x78
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Table 11. Configuration Data Organization (continued)
Byte
Address
0x09
Configuration
Item Name
Reserved
General Purpose I/O Pin
Output Enable
0x0A
Reserved
GPIO Output Pin State
Configuration
Item Description
Required
Contents
Variable
Contents
Bits 7:6
Reserved. Must be set to zero.
Bits 5:0
GPIO[5:0] Input and output control. GPIOs can be individually set as inputs or outputs using these bits.
0 = Hi-Z (pin is an input). The state of the signal connected
to GPIO input pins is reported in the SYSIRQ or HID data.
1 = Output enabled (pin is an output). The state of GPIO
output pins is controlled by the value in address 0x0A.
0x00
Bits 7:6
Reserved. Must be set to zero.
Bits 5:0
These bits select the value driven on the GPIO pins that are
configured as outputs in configuration address 0x09.
0 = Drive the GPIO pin LOW
1 = Drive the GPIO pin HIGH
0x00
0x0B
LUN0 Identify String
This byte is a pointer to the start of a 24 byte ASCII
(non-Unicode) string in the EEPROM that is used as the
LUN0 device identifier. This string is used by many operating
systems as the user-visible name for the drive. If this byte is
0x00, the Identify Device data from the drive is used instead.
0x00
0x0C
LUN1 Identify String
This byte is a pointer to the start of a 24 byte ASCII
(non-Unicode) string in the EEPROM that is used as the
LUN1 device identifier. This string is used by many operating
systems as the user-visible name for the drive. If this byte is
0x00, the Identify Device data from the drive is used instead.
0x00
0x0D
Delay After Reset
Number of 20-ms ticks to wait between AT2LP startup or
reset, and the first attempt to access any drives.
0x00
0x0E
Reserved
Bits 7:5
Must be set to zero.
0x00
Bus-Powered Flag
Bit 4
Enable bus-powered HDD support. This bit enables the use
of DRVPWRVLD features without reporting the LUN0 device
as removable media.
0 = LUN0 is removable media or DRVPWRVLD is disabled
1 = LUN0 device is bus-powered and non-removable
CF UDMA Enable
Bit 3
Enable UDMA transfers for removable devices. Some CF
devices interfere with UDMA transfers when more than one
drive is connected to the ATA bus.
0 = Do not use UDMA transfers with removable devices
(UDMA signals are not connected to the CF pins).
1 = Allow UDMA transfers to be used with removable
devices (UDMA signals are connected to the CF pins).
Fixed Number of Logical
Bits 2:1
Assume the presence of devices and do not perform a
search of the ATA bus to discover the number of LUNs.
00 = Search ATA bus and determine number of LUNs
01 = Assume only LUN0 present; no ATA bus search
10 = Assume LUN0 and LUN1 present; no ATA bus search
11 = Assume LUN0 and LUN1 present; no ATA bus search
Document 001-05809 Rev. *C
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Table 11. Configuration Data Organization (continued)
Byte
Address
0x0F
Configuration
Item Name
Configuration
Item Description
Search ATA on VBUS
Bit 0
Search for ATA devices when VBUS returns. If this bit is set,
the ATA bus is searched for ATA devices every time
VBUS_ATA_ENABLE is asserted. This feature enables the
AT2LP to be used in designs where the drive may be physically removed (such as docking stations or port replicators).
0 = Search ATA bus on VBUS_ATA_ENABLE assertion
1 = No ATA bus search on VBUS_ATA_ENABLE assertion
Reserved
Must be set to 0x00
Required
Contents
Variable
Contents
0x00
Device Descriptor
0x10
bLength
Length of device descriptor in bytes
0x12
0x11
bDescriptor Type
Descriptor type.
0x01
0x12
bcdUSB (LSB)
USB Specification release number in BCD
0x13
bcdUSB (MSB)
0x14
bDeviceClass
Device class
0x00
0x15
bDeviceSubClass
Device subclass
0x00
0x00
0x02
0x16
bDeviceProtocol
Device protocol
0x00
0x17
bMaxPacketSize0
USB packet size supported for default pipe
0x40
0x18
idVendor (LSB)
0x19
idVendor (MSB)
Vendor ID. Cypress’ Vendor ID may only be used for evaluation purposes, and not in released products.
Your
Vendor ID
0x1A
idProduct (LSB)
Product ID
0x1B
idProduct (MSB)
Your
Product ID
0x1C
bcdDevice (LSB)
Device release number in BCD LSB (product release
number)
0x1D
bcdDevice (MSB)
Device release number in BCD MSB (silicon release
number)
0x1E
iManufacturer
Index to manufacturer string. This entry must equal half of
the address value where the string starts or 0x00 if the string
does not exist.
0x53
0x1F
iProduct
Index to product string. This entry must equal half of the
address value where the string starts or 0x00 if the string
does not exist.
0x69
0x20
iSerialNumber
Index to serial number string. This entry must equal half of
the address value where the string starts or 0x00 if the string
does not exist. The USB Mass Storage Class Bulk-Only
Transport Specification requires a unique serial number (in
upper case, hexadecimal characters) for each device.
0x75
0x21
bNumConfigurations
Number of configurations supported
1 for mass storage: 2 for HID: 3 for CSM
0x03
Your
release
number
Device Qualifier
0x22
bLength
Length of device descriptor in bytes
0x0A
0x23
bDescriptor
Type Descriptor type
0x06
0x24
bcdUSB (LSB)
USB Specification release number in BCD
0x00
0x25
bcdUSB (MSB)
USB Specification release number in BCD
0x02
0x26
bDeviceClass
Device class
0x00
0x27
bDeviceSubClass
Device subclass
0x00
0x28
bDeviceProtocol
Device protocol
0x00
Document 001-05809 Rev. *C
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Table 11. Configuration Data Organization (continued)
Byte
Address
Configuration
Item Name
Configuration
Item Description
Required
Contents
0x29
bMaxPacketSize0
USB packet size supported for default pipe
0x2A
bNumConfigurations
Number of configurations supported
0x01
0x2B
bReserved
Reserved for future use. Must be set to zero
0x00
Length of configuration descriptor in bytes
0x09
0x02
Variable
Contents
0x40
Configuration Descriptor
0x2C
bLength
0x2D
bDescriptorType
Descriptor type
0x2E
bTotalLength (LSB)
0x2F
bTotalLength (MSB)
Number of bytes returned in this configuration. This includes
the configuration descriptor plus all the interface and
endpoint descriptors.
0x30
bNumInterfaces
Number of interfaces supported
0x31
bConfiguration Value
The value to use as an argument to Set Configuration to
select the configuration. This value must be set to 0x01.
0x32
iConfiguration
Index to the configuration string. This entry must equal half
of the address value where the string starts, or 0x00 if the
string does not exist.
0x00
0x33
bmAttributes
Device attributes for this configuration
Bit 7 Reserved. Must be set to 1
Bit 6 Self-powered. See Table 4 for reported value
Bit 5 Remote wakeup. Must be set to 0
Bits 4–0 Reserved. Must be set to 0
0xC0
0x34
bMaxPower
Maximum power consumption for this configuration. Units
used are mA*2 (i.e., 0x31 = 98 mA, 0xF9 = 498 mA). The
value entered here is only used by the 56-pin packages and
affect the reported value of bit 6 of address 0x33 in that case.
See Table 4 on page 14 for a description of what value is
reported to the host by the AT2LP.
0x01
0x20
0x00
0x01
0x01
Interface and Endpoint Descriptors
Interface Descriptor
0x35
bLength
Length of interface descriptor in bytes
0x09
0x36
bDescriptorType
Descriptor type
0x04
0x37
bInterfaceNumber
Interface number
0x00
0x38
bAlternateSetting
Alternate setting
0x00
0x39
bNumEndpoints
Number of endpoints
0x3A
bInterfaceClass
Interface class
0x3B
bInterfaceSubClass
Interface subclass
0x3C
bInterfaceProtocol
Interface protocol
0x3D
iInterface
Index to first interface string. This entry must equal half of
the address value where the string starts or 0x00 if the string
does not exist.
0x02
0x08
0x06
0x50
0x00
USB Bulk Out Endpoint
0x3E
bLength
Length of this descriptor in bytes
0x07
0x3F
bDescriptorType
Endpoint descriptor type
0x05
0x40
bEndpointAddress
This is an Out endpoint, endpoint number 2.
0x02
0x41
bmAttributes
This is a bulk endpoint.
0x02
0x42
wMaxPacketSize (LSB)
0x43
wMaxPacketSize (MSB)
Max data transfer size. To be set by speed (Full speed
0x0040; High speed 0x0200)
Document 001-05809 Rev. *C
0x00
0x02
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Table 11. Configuration Data Organization (continued)
Byte
Address
0x44
Configuration
Item Name
bInterval
Configuration
Item Description
Required
Contents
High speed interval for polling (maximum NAK rate)
0x00
Variable
Contents
USB Bulk In Endpoint
0x45
bLength
Length of this descriptor in bytes
0x07
0x46
bDescriptorType
Endpoint descriptor type
0x05
0x47
bEndpointAddress
This is an In endpoint, endpoint number 6
0x86
0x02
0x48
bmAttributes
This is a bulk endpoint
0x49
wMaxPacketSize (LSB)
0x4A
wMaxPacketSize (MSB)
Max data transfer size. Automatically set by AT2 (Full speed
0x0040; High speed 0x0200)
0x4B
bInterval
High speed interval for polling (maximum NAK rate)
0x00
0x02
0x00
(Optional) HID Interface Descriptor
0x4C
bLength
Length of HID interface descriptor
0x09
0x4D
bDescriptorTypes
Interface descriptor type
0x04
0x4E
bInterfaceNumber
Number of interfaces (2)
0x02
0x4F
bAlternateSetting
Alternate setting
0x00
0x50
bNumEndpoints
Number of endpoints used by this interface
0x01
0x51
bInterfaceClass
Class code
0x03
0x52
bInterfaceSubClass
Sub class
0x00
0x53
bInterfaceSubSubClass
Sub Sub class
0x00
0x54
iInterface
Index of string descriptor
0x00
USB Interrupt In Endpoint
0x5E
bLength
Length of this descriptor in bytes
0x07
0x5F
bDescriptorType
Endpoint descriptor type
0x05
0x60
bEndpointAddress
This is an In endpoint, endpoint number 1
0x81
0x61
bmAttributes
This is an interrupt endpoint
0x03
0x62
wMaxPacketSize (LSB)
Max data transfer size
0x02
0x63
wMaxPacketSize (MSB)
0x64
bInterval
0x00
Interval for polling (max. NAK rate)
0x10
Length of HID descriptor
0x09
(Optional) HID Descriptor
0x55
bLength
0x56
bDescriptorType
Descriptor Type HID
0x21
0x57
bcdHID (LSB)
HID Class Specification release number (1.10)
0x10
0x58
bcdHID (MSB)
0x59
bCountryCode
Country Code
0x00
0x01
0x5A
bNumDescriptors
Number of class descriptors (1 report descriptor)
0x01
0x5B
bDescriptorType
Descriptor Type
0x22
0x5C
wDescriptorLength (LSB)
Length of HID report descriptor
0x22
0x5D
wDescriptorLength (MSB)
0x00
Terminator Descriptors
0x65
Terminator
0x00
(Optional) HID Report Descriptor
Document 001-05809 Rev. *C
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CY7C68320C, CY7C68321C
Table 11. Configuration Data Organization (continued)
Byte
Address
0x66
Configuration
Item Name
Usage_Page
Configuration
Item Description
Vendor defined
Required
Contents
Variable
Contents
0x06
0x67
0xA0
0x68
0xFF
0x69
Usage
Vendor defined
0x6A
0x6B
Collection
Application
0x6C
0x6D
0x09
0xA5
0xA1
0x01
Usage
Vendor defined
0x6E
0x09
0xA6
Input Report
0x6F
Usage
Vendor defined
Logical_Minimum
–128
0x15
Logical_Maximum
127
0x25
Report_Size
8 bits
0x75
Report_Count
2 fields
0x95
Input
Input (Data, Variable, Absolute)
0x81
0x70
0x71
0xA7
0x72
0x73
0x80
0x74
0x75
0x7F
0x76
0x77
0x08
0x78
0x79
0x09
0x02
0x7A
0x02
Output Report
0x7B
Usage
Usage - vendor defined
0x7C
0x7D
Logical_Minimum
Logical Minimum (–128)
0x7E
0x7F
Logical_Maximum
Logical Maximum (127)
Report_Size
Report Size 8 bits
0x75
0x08
Report_Count
Report Count 2 fields
0x84
0x85
0x25
0x7F
0x82
0x83
0x15
0x80
0x80
0x81
0x09
0xA9
0x95
0x02
Output
Output (Data, Variable, Absolute)
0x86
0x91
0x02
0x87
End Collection
0xC0
(optional) Standard Content Security Interface Descriptor
0x88
bLength
Byte length of this descriptor
0x09
0x89
bDescriptorType
Interface Descriptor type
0x0D
0x8A
bInterfaceNumber
Number of interface
0x02
0x8B
bAlternateSetting
Value used to select an alternate setting for the interface
identified in prior field
0x00
Document 001-05809 Rev. *C
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Table 11. Configuration Data Organization (continued)
Byte
Address
0x8C
Configuration
Item Name
bNumEndpoints
Configuration
Item Description
0x8D
bInterfaceClass
Number of endpoints used by this interface (excluding
endpoint 0) that are CSM dependent
0x8E
bInterfaceSubClass
Must be set to zero
Required
Contents
Variable
Contents
0x02
0x0D
0x00
0x8F
bInterfaceProtocol
Must be set to zero
0x00
0x90
iInterface
Index of a string descriptor that describes this Interface
0x00
Length of this descriptor in bytes
0x09
Channel Descriptor
0x91
bLength
0x92
bDescriptorType
Channel descriptor type
0x22
0x93
bChannelID
Number of the channel, must be a zero based value that is
unique across the device
0x00
0x94
bmAttributes
Bits7:5
Reserved. Must be set to zero
0x01
Bits 4:0
0x95
bRecipient
Identifier of the target recipient
If Recipient type field of bmAttributes = 1 then
bRecipient field is the bInterfaceNumber
If Recipient type field of bmAttributes = 2 then
bRecipient field is an endpoint address, where:
D7: Direction (0 = Out, 1 = IN)
D6...D4: Reserved and set to zero
D3...D0: Endpoint number
0x00
0x96
bRecipientAlt
alternate setting for the interface to which this channel
applies
0x00
0x97
bRecipientLogicalUnit
Recipient Logical Unit
0x00
0x98
bMethod
Index of a class-specific CSM descriptor That describes one
of the Content Security Methods (CSM) offered by the
device
0x01
0x99
bMethodVariant
CSM Variant descriptor
0x00
Byte length of this descriptor
0x06
CSM Descriptor
0x9A
bLength
0x9B
bDescriptorType
CSM Descriptor type
0x23
0x9C
bMethodID
Index of a class-specific CSM descriptor that describes on
of the Content Security Methods offered by the device
0x01
0x9D
iCSMDescriptor
Index of string descriptor that describes the Content Security
Method
0x00
0x9E
bcdVersion (LSB)
CSM Descriptor Version number
0x10
0x9F
bcsVersion (MSB)
0xA0
Terminator
0x02
0x00
USB String Descriptor–Index 0 (LANGID)
0xA1
bLength
LANGID string descriptor length in bytes
0x04
0x03
0xA2
bDescriptorType
Descriptor type
0xA3
LANGID (LSB)
0xA4
LANGID (MSB)
Language supported. The CY7C68300B supports one
LANGID value.
0x09
0x04
USB String Descriptor–Manufacturer
0xA5
bLength
String descriptor length in bytes (including bLength)
0xA6
bDescriptorType
Descriptor type
Document 001-05809 Rev. *C
0x2C
0x03
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Table 11. Configuration Data Organization (continued)
Byte
Address
Configuration
Item Name
Configuration
Item Description
Required
Contents
Variable
Contents
0xA7
bString
Unicode character LSB
’C’ 0x43
0xA8
bString
Unicode character MSB
0x00
0xA9
bString
Unicode character LSB
’y’ 0x79
0xAA
bString
Unicode character MSB
0x00
0xAB
bString
Unicode character LSB
’p’ 0x70
0xAC
bString
Unicode character MSB
0x00
0xAD
bString
Unicode character LSB
’r’ 0x72
0xAE
bString
Unicode character MSB
0x00
0xAF
bString
Unicode character LSB
’e’ 0x65
0xB0
bString
Unicode character MSB
0x00
0xB1
bString
Unicode character LSB
’s’ 0x73
0xB2
bString
Unicode character MSB
0x00
0xB3
bString
Unicode character LSB
’s’ 0x73
0xB4
bString
Unicode character MSB
0x00
0xB5
bString
Unicode character LSB
’ ’ 0x20
0xB6
bString
Unicode character MSB
0x00
0xB7
bString
Unicode character LSB
’S’ 0x53
0xB8
bString
Unicode character MSB
0x00
0xB9
bString
Unicode character LSB
’e’ 0x65
0xBA
bString
Unicode character MSB
0x00
0xBB
bString
Unicode character LSB
’m’ 0x6D
0xBC
bString
Unicode character MSB
0x00
0xBD
bString
Unicode character LSB
’i’ 0x69
0xBE
bString
Unicode character MSB
0x00
0xBF
bString
Unicode character LSB
’c’ 0x63
0xC0
bString
Unicode character MSB
0x00
0xC1
bString
Unicode character LSB
’o’ 0x6F
0xC2
bString
Unicode character MSB
0x00
0xC3
bString
Unicode character LSB
’n’ 0x6E
0xC4
bString
Unicode character MSB
0x00
0xC5
bString
Unicode character LSB
’d’ 0x64
0xC6
bString
Unicode character MSB
0x00
0xC7
bString
Unicode character LSB
’u’ 0x75
0xC8
bString
Unicode character MSB
0x00
0xC9
bString
Unicode character LSB
’c’ 0x63
0xCA
bString
Unicode character MSB
0x00
0xCB
bString
Unicode character LSB
’t’ 0x74
0xCC
bString
Unicode character MSB
0x00
0xCD
bString
Unicode character LSB
’o’ 0x6F
0xCE
bString
Unicode character MSB
0x00
0xCF
bString
Unicode character LSB
’r’ 0x72
0xD0
bString
Unicode character MSB
0x00
Document 001-05809 Rev. *C
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Table 11. Configuration Data Organization (continued)
Byte
Address
Configuration
Item Name
Configuration
Item Description
Required
Contents
Variable
Contents
USB String Descriptor–Product
0xD1
bLength
String descriptor length in bytes (including bLength)
0xD2
bDescriptorType
Descriptor type.
0x2C
0xD3
bString
Unicode character LSB
’U’ 0x55
0xD4
bString
Unicode character MSB
0x00
0x03
0xD5
bString
Unicode character LSB
’S’ 0x53
0xD6
bString
Unicode character MSB
0x00
0xD7
bString
Unicode character LSB
’B’ 0x42
0xD8
bString
Unicode character MSB
0x00
0xD9
bString
Unicode character LSB
’2’ 0x32
0xDA
bString
Unicode character MSB
0x00
0xDB
bString
Unicode character LSB
’.’ 0x2E
0xDC
bString
Unicode character MSB
0x00
0xDD
bString
Unicode character LSB
’0’ 0x30
0xDE
bString
Unicode character MSB
0x00
0xDF
bString
Unicode character LSB
’ ’ 0x20
0xE0
bString
Unicode character MSB
0x00
0xE1
bString
Unicode character LSB
’D’ 0x53
0xE2
bString
Unicode character MSB
0x00
0xE3
bString
Unicode character LSB
’i’ 0x74
0xE4
bString
Unicode character MSB
0x00
0xE5
bString
Unicode character LSB
’s’ 0x6F
0xE6
bString
Unicode character MSB
0x00
0xE7
bString
Unicode character LSB
’k’ 0x72
0xE8
bString
Unicode character MSB
0x00
USB String Descriptor–Serial Number (Note: The USB Mass Storage Class specification requires a unique serial number in
each device. If you do not provide a unique serial number, the operating system may crash. The serial number must be at least
12 characters, but some USB hosts only use the least significant 12 characters of the serial number as a unique identifier.
0xE9
bLength
0xEA
bDescriptor Type
Descriptor type.
0XEB
bString
Unicode character LSB
0XEC
bString
Unicode character MSB
0x00
0XED
bString
Unicode character LSB
’2’ 0x32
0XEE
bString
Unicode character MSB
0x00
0XEF
bString
Unicode character LSB
’3’ 0x33
0XF0
bString
Unicode character MSB
0x00
0xF1
bString
Unicode character LSB
’4’ 0x34
0xF2
bString
Unicode character MSB
0x00
0xF3
bString
Unicode character LSB
’5’ 0x35
0xF4
bString
Unicode character MSB
0x00
0xF5
bString
Unicode character LSB
’6’ 0x36
0xF6
bString
Unicode character MSB
0x00
0xF7
bString
Unicode character LSB
’7’ 0x37
Document 001-05809 Rev. *C
String descriptor length in bytes (including bLength).
0x22
0x03
’1’ 0x31
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Table 11. Configuration Data Organization (continued)
Byte
Address
0xF8
Configuration
Item Name
bString
Configuration
Item Description
Required
Contents
Variable
Contents
Unicode character MSB
0x00
0xF9
bString
Unicode character LSB
’8’ 0x38
0xFA
bString
Unicode character MSB
0x00
0xFB
bString
Unicode character LSB
’9’ 0x39
0xFC
bString
Unicode character MSB
0x00
0xFD
bString
Unicode character LSB
’0’ 0x30
0xFE
bString
Unicode character MSB
0x00
0xFF
bString
Unicode character LSB
’A’ 0x41
0Xxx
bString
Unicode character MSB
0x00
0Xxx
bString
Unicode character LSB
’B’ 0x42
0Xxx
bString
Unicode character MSB
0x00
Identify Device String (Note: This is not a Unicode string. It is the ASCII string returned by the device in the Identify Device
information. It is a fixed length (24 bytes). Changing this string may cause CD authoring software to incorrectly identify the device.)
0Xxx
Device name byte 1
ASCII Character
’C’ 0x43
0Xxx
Device name byte 2
ASCII Character
’y’ 0x79
0Xxx
Device name byte 3
ASCII Character
’p’ 0x70
0Xxx
Device name byte 4
ASCII Character
’r’ 0x72
0Xxx
Device name byte 5
ASCII Character
’e’ 0x65
0Xxx
Device name byte 6
ASCII Character
’s’ 0x73
0Xxx
Device name byte 7
ASCII Character
’s’ 0x73
0Xxx
Device name byte 8
ASCII Character
’ ’ 0x20
0Xxx
Device name byte 9
ASCII Character
’C’ 0x43
0Xxx
Device name byte 10
ASCII Character
’u’ 0x75
0Xxx
Device name byte 11
ASCII Character
’s’ 0x73
0Xxx
Device name byte 12
ASCII Character
’t’ 0x74
0Xxx
Device name byte 13
ASCII Character
’o’ 0x6f
0Xxx
Device name byte 14
ASCII Character
’m’ 0x6d
0Xxx
Device name byte 15
ASCII Character
’ ’ 0x20
0Xxx
Device name byte 16
ASCII Character
’N’ 0x4e
0Xxx
Device name byte 17
ASCII Character
’a’ 0x61
0Xxx
Device name byte 18
ASCII Character
’m’ 0x6d
0Xxx
Device name byte 19
ASCII Character
’e’ 0x65
0Xxx
Device name byte 20
ASCII Character
’ ’ 0x20
0Xxx
Device name byte 21
ASCII Character
’L’ 0x4c
0Xxx
Device name byte 22
ASCII Character
’U’ 0x55
0Xxx
Device name byte 23
ASCII Character
’N’ 0x4e
0Xxx
Device name byte 24
ASCII Character
’0’ 0x30
0Xxx
Unused ROM Space
Amount of unused ROM space varies depending on strings.
0xFF
Note: More than 0X100 bytes of configuration are shown for example only. The AT2LP only supports addresses up to 0xFF.
Document 001-05809 Rev. *C
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Programming the EEPROM
LOAD_CONFIG_DATA
There are three methods of programming the EEPROM:
■
Stand-alone EEPROM programmer
This request enables writes to the AT2LP’s configuration data
space. The wIndex field specifies the starting address and the
wLength field denotes the data length in bytes.
■
Vendor-specific USB commands, listed in Table 12
Legal values for wValue are as follows:
■
In-system programming (for example, bed-of-nails tester)
■
0x0000 Internal Config bytes, address range 0x2 – 0xF
■
0x0002 External I2C memory device
Any vendor-specific USB write request to the Serial ROM device
configuration space simultaneously update internal configuration
register values as well. If the I2C device is programmed without
vendor specific USB commands, the AT2LP must be synchronously reset (toggle RESET#) before configuration data is
reloaded.
The AT2LP supports a subset of the ’slow mode’ specification
(100 KHz) required for 24LCXXB EEPROM family device
support. Features such as ’Multi-Master,’ ’Clock Synchronization’ (the SCL pin is output only), ’10-bit addressing,’ and
’CBUS device support’ are not supported. Vendor-specific USB
commands enable the AT2LP to address up to 256 bytes of
EEPROM data.
Internal Config byte writes must be constrained to addresses 0x2
through 0xF, as shown in Table 12. Attempts to write outside this
address space result in undefined operation. Internal Config byte
writes only overwrite AT2LP Configuration Byte registers, the
original data source (I2C memory device) remains unchanged.
Table 12. EEPROM-related Vendor-specific Commands
Label
bmRequestType bRequest
LOAD_CONFIG_DATA
0x40
0x01
READ_CONFIG_DATA
0xC0
0x02
wValue
0x0000
Data Source
wIndex
30x02 – 0x0F
wLength
Data Length
Starting Address Data Length
Data
Configuration
Data
Configuration
Data
READ_CONFIG_DATA
This USB request enables data retrieval from the data source specified by the wValue field. Data is retrieved beginning at the address
specified by the wIndex field (see Table 12). The wLength field denotes the length in bytes of data requested from the data source.
Legal values for wValue are as follows:
■
0x0000
Configuration bytes, addresses 0x0 – 0xF only
■
0x0002
External I2C memory device
Illegal values for wValue result in an undefined operation. Attempted reads from an I2C memory device when none is connected result
in an undefined operation. Attempts to read configuration bytes with starting addresses greater than 0xF also, result in an undefined
operation.
Document 001-05809 Rev. *C
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Absolute Maximum Ratings
Operating Conditions
Exceeding maximum ratings may impair the useful life of the
device. These user guidelines are not tested.
Supply Voltage............................................+3.00V to +3.60V
Storage Temperature .................................. –65°C to +150°C
Ground Voltage.................................................................. 0V
Ambient Temperature with Power Supplied...... 0°C to +70°C
Fosc (Oscillator or Crystal Frequency) .... 24 MHz ± 100 ppm,
Parallel Resonant
Supply Voltage to Ground Potential................–0.5V to +4.0V
TA (Ambient Temperature Under Bias) ............. 0°C to +70°C
DC Input Voltage to Any Input Pin ................................ 5.25V
DC Voltage Applied to Outputs in Hi-Z State–0.5V to VCC + 0.5V
Power Dissipation..................................................... 300 mW
Static Discharge Voltage........................................... > 2000V
Max Output Current Per I/O Port
(D0-D7, D8-15, ATA control)........................................ 10 mA
DC Characteristics
Parameter
Min
Typ
Max
Unit
Supply Voltage
3.00
3.3
3.60
V
VCC Ramp
Supply Ramp Up 0V to 3.3V
200
VIH
Input High Voltage
VIL
Input Low Voltage
II
Input Leakage Current
VCC
Description
Conditions
μs
2
5.25
–0.5
0 < VIH < VCC
V
0.8
V
±10
μA
VIH_X
Crystal Input HIGH Voltage
2
5.25
V
VIL_X
Crystal Input LOW Voltage
–0.5
0.8
V
VOH
Output Voltage High
IOUT = 4 mA
VOL
Output Voltage Low
IOUT = –4 mA
0.4
V
IOH
Output Current High
4
mA
IOL
Output Current Low
4
mA
CIN
Input Pin Capacitance
All but DPLUS/DMINUS
10
pF
DPLUS/DMINUS
15
pF
ISUSP
ICC
2.4
V
Suspend Current
Connected
0.5
1.2
mA
CY7C68300C/CY7C68320C
Disconnected
0.3
1.0
mA
Suspend Current
Connected
300
380
μA
CY7C68301C/CY7C68321C
Disconnected
100
150
μA
Supply Current
USB High Speed
50
85
mA
USB Full Speed
35
65
mA
43
IUNCONFIG
Unconfigured Current
Current before device is granted full
amount requested in bMaxPower
TRESET
Reset Time After Valid Power
VCC > 3.0V
Pin Reset After Power Up
Document 001-05809 Rev. *C
mA
5.0
ms
200
μs
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AC Electrical Characteristics
ATA Timing Characteristics
The ATA interface supports ATA PIO modes 0, 3, and 4, Ultra
DMA modes 2, 3, and 4, and multi-word DMA mode 2, per the
ATA/ATAPI 6 Specification. The highest enabled transfer rate
common to both the AT2LP and the attached mass storage
device is used. The AT2LP automatically determines the transfer
rates during drive initialization based upon the values in the
AT2LP configuration space and the data reported by the drives
in response to an IDENTIFY DEVICE command.
USB Transceiver Characteristics
Complies with the USB 2.0 specification for full- and high speed
modes of operation.
Ordering Information
Part Number
Package Type
GPIO Pins
CY7C68300C-56PVXC
56 SSOP Pb-free for self and bus powered designs
–
CY7C68301C-56PVXC
56 SSOP Pb-free for battery-powered designs
–
CY7C68300C-56LFXC
56 QFN Pb-free for self and bus powered designs
–
CY7C68300C-56LTXC
56 QFN Sawn Pb-free for self and bus powered designs
–
CY7C68301C-56LFXC
56 QFN Pb-free for battery-powered designs
–
CY7C68301C-56LTXC
56 QFN Sawn Pb-free for battery-powered designs
–
CY7C68320C-56LFXC
56 QFN Pb-free for self and bus powered designs
3[4]
CY7C68320C-56PVXC
56 SSOP Pb-free for self and bus powered designs
3[4]
CY7C68320C-56LTXC
56 QFN Sawn Pb-free for self and bus powered designs
3[4]
CY7C68321C-56LFXC
56 QFN Pb-free for battery-powered designs
3[4]
CY7C68321C-56LTXC
56 QFN Sawn Pb-free for battery-powered designs
3[4]
CY7C68320C-100AXC
100 TQFP Pb-free for self and bus powered designs
CY7C68321C-100AXC
100 TQFP Pb-free for battery-powered designs
CY4615B
EZ-USB AT2LP Reference Design Kit
6
6
n/a
Note
4. The General Purpose inputs can be enabled on ATAPUEN, PWR500#, and DRVPWRVLD with EEPROM byte 8, bit 7 on CY7C68320C/CY7C68321C.
Document 001-05809 Rev. *C
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Package Diagrams (continued)
Figure 12. 100-Pin Thin Plastic Quad Flatpack (14 x 20 x 1.4 mm) A101
16.00±0.20
1.40±0.05
14.00±0.10
100
81
80
1
20.00±0.10
22.00±0.20
0.30±0.08
0.65
TYP.
30
12°±1°
(8X)
SEE DETAIL
A
51
31
50
0.20 MAX.
0.10
1.60 MAX.
R 0.08 MIN.
0.20 MAX.
0° MIN.
SEATING PLANE
STAND-OFF
0.05 MIN.
0.15 MAX.
0.25
NOTE:
1. JEDEC STD REF MS-026
GAUGE PLANE
0°-7°
R 0.08 MIN.
0.20 MAX.
2. BODY LENGTH DIMENSION DOES NOT INCLUDE MOLD PROTRUSION/END FLASH
MOLD PROTRUSION/END FLASH SHALL NOT EXCEED 0.0098 in (0.25 mm) PER SIDE
BODY LENGTH DIMENSIONS ARE MAX PLASTIC BODY SIZE INCLUDING MOLD MISMATCH
3. DIMENSIONS IN MILLIMETERS
0.60±0.15
0.20 MIN.
51-85050-*B
1.00 REF.
DETAIL
Document 001-05809 Rev. *C
A
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Figure 13. 56-Pin Shrunk Small Outline Package 056
51-85062 *C
Figure 14. 56-Pin QFN 8 x 8 mm LF56A
51-85144 *G
Document 001-05809 Rev. *C
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Figure 15. 56-Pin QFN (8 X 8 X 0.9 MM) - Sawn
001-53450 **
General PCB Layout Recommendations for
USB Mass Storage Designs
Quad Flat Package No Leads (QFN) Package
Design Notes
The following recommendations must be followed to ensure
reliable high-performance operation:
■ Use at least a four-layer, impedance controlled board to
maintain signal quality.
Electrical contact of the part to the Printed Circuit Board (PCB)
is made by soldering the leads on the bottom surface of the
package to the PCB. Hence, special attention is required to the
heat transfer area below the package to provide a good thermal
bond to the circuit board. A Copper (Cu) fill must be designed
into the PCB as a thermal pad under the package. Heat is transferred from the AT2LP through the device’s metal paddle on the
bottom side of the package. Heat from here is conducted to the
PCB at the thermal pad. It is then conducted from the thermal
pad to the PCB inner ground plane by a 5 x 5 array of vias. A via
is a plated through-hole in the PCB with a finished diameter of
13 mil. The QFN’s metal die paddle must be soldered to the
PCB’s thermal pad. Solder mask is placed on the board top side
over each via to resist solder flow into the via. The mask on the
top side also minimizes outgassing during the solder reflow
process.
■
■
■
■
■
■
■
■
■
■
Specify specific impedance targets (ask your board vendor
what they can achieve).
Maintain uniform trace widths and trace spacing to control
impedance.
Minimize reflected signals by avoiding using stubs and vias.
Connect the USB connector shell and signal ground as near to
the USB connector as possible.
Use bypass/flyback capacitors on VBUS near the connector.
Keep DPLUS and DMINUS trace lengths to within 2 mm of
each other in length, with a preferred length of 20–30 mm.
Maintain a solid ground plane under the DPLUS and DMINUS
traces. Do not allow the plane to be split under these traces.
Do not place vias on the DPLUS or DMINUS trace routing for
a more stable design.
Isolate the DPLUS and DMINUS traces from all other signal
traces by no less than 10 mm.
Source for recommendations:
❐ EZ-USB FX2LP PCB Design Recommendations
www.cypress.com/?docID=4696
❐ High speed USB Platform Design Guidelines
http://www.usb.org/developers/
docs/hs_usb_pdg_r1_0.pdf
Document 001-05809 Rev. *C
For further information on this package design, refer to the application note Surface Mount Assembly of AMKOR’s MicroLeadFrame (MLF) Technology. The application note provides detailed
information on board mounting guidelines, soldering flow, rework
process, etc.
Figure 16 displays a cross-sectional area underneath the
package. The cross section is of only one via. The solder paste
template needs to be designed to enable at least 50% solder
coverage. The thickness of the solder paste template must be
5 mil. It is recommended that ’No Clean,’ type 3 solder paste is
used for mounting the part. Nitrogen purge is recommended
during reflow.
Page 39 of 41
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CY7C68300C, CY7C68301C
CY7C68320C, CY7C68321C
Figure 16. Cross-Section of the Area Under the QFN Package
0.017” dia
Solder Mask
Cu Fill
Cu Fill
PCB Material
0.013” dia
Via hole for thermally connecting the
QFN to the circuit board ground plane.
PCB Material
This figure only shows the top three layers of the
circuit board: Top Solder, PCB Dielectric, and
the Ground Plane
Figure 17 is a plot of solder mask pattern and Figure 18 displays an X-Ray image of assembly (darker areas indicate solder).
Figure 17. Plot of the Solder Mask (White Area)
Figure 18. X-Ray Image of the Assembly
Other Design Considerations
IDE Removable Media Devices
Certain design considerations must be followed to ensure proper
operation of the CY7C68300C/CY7C68301C. The following
items must be taken into account when designing a USB device
with the CY7C68300C/CY7C68301C.
The AT2LP does not fully support IDE removable media devices.
Changes in media state are not reported to the operating system
so users are unable to eject/reinsert media properly. This may
result in lost or corrupted data. Note that standard ATAPI optical
drives and ATA CompactFlash-type devices are not part of this
group.
Proper Power Up Sequence
Power must be applied to the CY7C68300C/CY7C68301C
before, or at the same time as the ATA/ATAPI device. If power is
supplied to the drive first, the CY7C68300C/CY7C68301C
startup in an undefined state. Designs that utilize separate power
supplies for the CY7C68300C/CY7C68301C and the ATA/ATAPI
device are not recommended.
Devices With Small Buffers
The size of the drive’s buffer can greatly affect the overall data
transfer performance. Care must be taken to ensure that drives
have large enough buffers to handle the flow of data to and from
it. The exact buffer size needed depends on a number of
variables, but a good rule of thumb is:
(aprox min buffer) = (data rate) * (seek time + rotation time + other)
where ’other’ may include things such as the time required to
switch heads, power up a laser, etc. Drives with buffers that are
too small to handle the extra data may perform considerably
slower than expected.
Document 001-05809 Rev. *C
Page 40 of 41
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CY7C68300C, CY7C68301C
CY7C68320C, CY7C68321C
Document History Page
Description Title: CY7C68300C/CY7C68301C/CY7C68320C/CY7C68321C EZ-USB AT2LP™ USB 2.0 to ATA/ATAPI Bridge
Document Number: 001-05809
REV.
ECN NO.
Submission
Date
Orig. of
Change
**
409321
See ECN
GIR
*A
611658
See ECN
ARI/KKU
Implemented new template. Added part number CY7C68320C-56PVXC to the
Ordering Information. Corrected part numbers on figure 5 and 6. Moved figure
titles to the top of each figure per new template requirements. Made
grammatical corrections. Changed the Fused Memory Data section. Added
new figure: 56-pin SSOP (CY7C68320C/CY7C68321C).
Changed figure 10 to reflect actual Flow for Operational Mode. Changes made
between “VBUS_ATA_ENABLE PIN HIGH?” and “Board Manufacturing Test
Mode”. Formatted “0=”, “1=” lines in Configuration Data Organization to always
show up in the same order. Re-worded 3rd bullet point in the Operation
Selection Flow section.
GPIO2_nHS function removed and corrected the sense of ATA_EN to allow
drive on ‘0’ and Hi-Z on ‘1’.
*B
2717536
06/11/2009
DPT
Added 56 QFN (8 X 8 mm) package diagram and added
CY7C68300C-56LTXC, CY7C68301C-56LTXC, CY7C68320C-56LTXC, and
CY7C68321C-56LTXC parts in the Ordering Information table
*C
2733311
07/08/09
NMMA
Description of Change
New data sheet.
Updated package drawing spec 51-85062
Updated link in the Additional Resources section
Updated Ordering information table
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© Cypress Semiconductor Corporation, 2006-2009. The information contained herein is subject to change without notice. Cypress Semiconductor Corporation assumes no responsibility for the use of
any circuitry other than circuitry embodied in a Cypress product. Nor does it convey or imply any license under patent or other rights. Cypress products are not warranted nor intended to be used for
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Disclaimer: CYPRESS MAKES NO WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, WITH REGARD TO THIS MATERIAL, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. Cypress reserves the right to make changes without further notice to the materials described herein. Cypress does not
assume any liability arising out of the application or use of any product or circuit described herein. Cypress does not authorize its products for use as critical components in life-support systems where
a malfunction or failure may reasonably be expected to result in significant injury to the user. The inclusion of Cypress’ product in a life-support systems application implies that the manufacturer
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Use may be limited by and subject to the applicable Cypress software license agreement.
Document 001-05809 Rev. *C
Revised July 08, 2009
Page 41 of 41
Purchase of I2C components from Cypress or one of its sublicensed Associated Companies conveys a license under the Philips I2C Patent Rights to use these components in an I2C system, provided
that the system conforms to the I2C Standard Specification as defined by Philips.
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