GPMC
Table 7-5. GPMC Pin Multiplexing Options (continued)
Non Multiplexed
Non Multiplexed
Multiplexed
16-Bit NAND
GPMC Signal
Address Data 16-
Address Data 8-Bit
Address Data 16-
8-Bit NAND Device
Device
Bit Device
(1)
Device
Bit Device
(1)
GPMC_AD[4]
D4
D4
A/D[4]
D4
D4
GPMC_AD[3]
D3
D3
A/D[3]
D3
D3
GPMC_AD[2]
D2
D2
A/D[2]
D2
D2
GPMC_AD[1]
D1
D1
A/D[1]
D1
D1
GPMC_AD[0]
D0
D0
A/D[0]
D0
D0
GPMC_CS[0]n
CS0n (Chip Select)
CS0n (Chip Select)
CS0n (Chip Select)
CE0n (Chip Enable)
CE0n (Chip Enable)
GPMC_CS[1]n
CS1n
CS1n
CS1n
CE1n
CE1n
GPMC_CS[2]n
CS2n
CS2n
CS2n
CE2n
CE2n
GPMC_CS[3]n
CS3n
CS3n
CS3n
CE3n
CE3n
GPMC_CS[4]n
CS4n
CS4n
CS4n
CE4n
CE4n
GPMC_CS[5]n
CS5n
CS5n
CS5n
CE5n
CE5n
GPMC_CS[6]n
CS6n
CS6n
CS6n
CE6n
CE6n
ADVn (Address
ADVn (Address
ADVn (Address
ALE (address latch
ALE (address latch
GPMC_ADVn_ALE
Value)
Value)
Value)
enable)
enable)
CLE (command
CLE (command
GPMC_BE0n_CLE
BE0n (Byte Enable)
BE0n (Byte Enable)
BE0n (Byte Enable)
latch enable)
latch enable)
GPMC_BE1n
BE1n
BE1n
BE1n
GPMC_CLK
CLK
CLK
CLK
OEn (Output
OEn (Output
OEn (Output
GPMC_OE_REn
REn (read enable)
REn (read enable)
Enable)
Enable)
Enable)
GPMC_WAIT0
WAIT0
WAIT0
WAIT0
R/B0n (ready/busy)
R/B0n (ready/busy)
GPMC_WAIT1
WAIT1
WAIT1
WAIT1
R/B1n (ready/busy)
R/B1n (ready/busy)
GPMC_WEn
WEn (Write Enable)
WEn (Write Enable)
WEn (Write Enable)
WEn (write enable)
WEn (write enable)
GPMC_WPn
WPn (Write Protect)
WPn (Write Protect)
WPn (Write Protect)
WPn (write protect)
WPn (write protect)
With all device types, the GPMC does not drive unnecessary address lines. They stay at their reset value
of 00.
Address mapping supports address/data-multiplexed 16-bit wide devices:
•
The NOR flash memory controller still supports non-multiplexed address and data memory devices.
•
Multiplexing mode can be selected through the GPMC_CONFIG1_i[9-8] MUXADDDATA bit field.
•
Asynchronous page mode is not supported for multiplexed address and data devices.
257
SPRUH73H – October 2011 – Revised April 2013
Memory Subsystem
Copyright © 2011–2013, Texas Instruments Incorporated