Datasheet

RM46L852
www.ti.com SPNS185C –SEPTEMBER 2012–REVISED JUNE 2015
4.3.2.15 External Memory Interface (EMIF)
Table 4-42. External Memory Interface (EMIF)
Terminal Signal Reset Pull Pull Type Description
Type State
Signal Name 337
ZWT
EMIF_CKE L3 Output Pullup None EMIF Clock Enable
EMIF_CLK K3 I/O None EMIF clock. This is an
output signal in functional
mode. It is gated off by
default, so that the signal
is pulled up. PINMUX29[8]
must be cleared to enable
this output.
EMIF_nOE E12 Output Pullup None EMIF Read Enable
EMIF_nWAIT P3 I/O Pullup Fixed 20 µA EMIF Extended Wait
Pullup Signal
EMIF_nWE D17 Output Pullup None EMIF Write Enable
EMIF_nCAS R4 Output EMIF column address
strobe
EMIF_nRAS R3 Output EMIF row address strobe
EMIF_nCS[0]/N2HET2[7]
(1)
N17 Output EMIF chip select,
synchronous
EMIF_nCS[2] L17 Output EMIF chip selects,
asynchronous
EMIF_nCS[3]/N2HET2[9]
(1)
K17 Output
This applies to chip
EMIF_nCS[4] M17 Output
selects 2, 3 and 4
EMIF_nDQM[0] E10 Output EMIF Data Mask or Write
Strobe.
EMIF_nDQM[1] E11 Output
Data mask for SDRAM
devices, write strobe for
connected asynchronous
devices.
EMIF_BA[0] E13 Output EMIF bank address or
address line
EMIF_BA[1]/N2HET2[5]
(1)
D16 Output EMIF bank address or
address line
EMIF_ADDR[0]/N2HET2[1]
(1)
D4 Output EMIF address
EMIF_ADDR[1]/N2HET2[3]
(1)
D5 Output
EMIF_ADDR[2] E6 Output
EMIF_ADDR[3] E7 Output
EMIF_ADDR[4] E8 Output
EMIF_ADDR[5] E9 Output
EMIF_ADDR[6]/N2HET2[11]
(1)
C4 Output
EMIF_ADDR[7]/N2HET2[13]
(1)
C5 Output
EMIF_ADDR[8]/N2HET2[15]
(1)
C6 Output
EMIF_ADDR[9] C7 Output
EMIF_ADDR[10] C8 Output
EMIF_ADDR[11] C9 Output
EMIF_ADDR[12] C10 Output
(1) These signals are tri-stated and pulled up by default after power-up. Any application that requires the EMIF must set the bit 31 of the
system module general-purpose register GPREG1.
Copyright © 2012–2015, Texas Instruments Incorporated Terminal Configuration and Functions 43
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