cs5954am Cypress Semiconductor Corporation., cs5954am Datasheet - Page 27

• Manufacturer Part Number: cs5954am
• Description: Usb Controller For Nand Flash
• Manufacturer: Cypress Semiconductor Corporation.

Table 7-1. Pin Assignment and Description (continued)
Document #: 38-08025 Rev. **
Pin No. Pin Name
52-55
42
43
44
45
46
47
48
49
50
51
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
A1
A0
TEST
nWRL
nWRH
nRD
nRESET
NC
VDD
VDD
NC
nXRAMSEL
nXROMSEL
nXMEMSEL
X_PCLK
SECLK or
GPIO31
SEDO or
GPIO30
USB_PU or
GPIO29
GPIO38
GND
GND
GPIO27
PWR_OFF or
GPIO26
IRQ1 (in) or
GPIO25
IRQ0 (in) or
GPIO24
GPIO23
GPIO22
GPIO21
GPIO20
ADDR or
GPIO19
VDD
GPIO18
GPIO17
GPIO16
GND
GPIO15
GPIO14
GPIO13
GPIO12
GPIO11
Pin Type
Output
Output
Output
Output
Output
Output
Output
Output
Output
Output
Output
Power
Power
Power
GND
GND
Input
GND
Input
Input
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
External Memory Address Bus, A1.
External Memory Address Bus, A0.
No Connection, MFG test only
Note: CS5954AM NC = 48 MHz, GND = 12 MHz.
Active LOW, Write to lower bank of External SRAM.
Active LOW, Write to upper bank of External SRAM.
Active LOW, Read from External SRAM or ROM.
Master Reset. CS5954AM Device active LOW reset input.
Reserved.
+3.3 VDC Supply.
+3.3 VDC Supply.
Reserved.
Active LOW, select external SRAM (16 bit).
Active LOW, select external ROM.
ory mapped device.
See register 0xC006 for more information.
SECLK, Serial EEPROM clock, or GPIO31.
SEDO, Serial flash EPROM Data, or GPIO30
This pin requires a 5-k pull-up.
Turn on/off D+ Pull-up Resistor, or GPIO29.
Digital ground.
Digital ground.
This signal can be used for device low-power mode: it will turn off or disable external
powers to the peripheral in suspend mode. Once USB power is resumed, external
power can be enabled again.
GPIO25, or IRQ1 (in) interrupts the CS5954AM processor.
IRQ0 (in) interrupts the CS5954AM processor.
GPIO23
GPIO22
GPIO21
GPIO20
ADDR = 1, Read/Write data from the INBUF/OUTBUFF, ADDR = 0 read data from
the STATUS register, or GPIO19.
+3.3 VDC Supply.
GPIO18
GPIO17
GPIO16
Digital ground.
GPIO15
GPIO14
GPIO13
GPIO12
GPIO11
Active LOW, select external Memory bus, external SRAM, DRAM, ROM or any mem-
ADVANCE
INFORMATION
Description
CS5954AM
Page 27 of 44