Sharp LC-37D90U - Page 67

LC-37D90U
5 – 51
P9 JTAG_TCK I JTAG Test Clock pin.
N9 JTAG_TRSTn I JTAG Reset pin. Active Low only.
MCIF Interface (PCI, 68K and SRAM-Like Interface
A14 MCIF_SEL1 I Microcontroller Interface Select. This pin is sampled at power-up and reset.
MCIF_SEL [1: 0].
00: SRAM-like I/F with fixed wait.
01: SRAM-like I/F with handshake.
10: 68k I/F.
11: PCI interface.
E9 MCIF_SEL0
F4 PCI_CLK I PCI Clock. Max frequency is 33MHz.
F2 PCI_INTAn
(MCIF_INTn)
O PCI Interrupt A. Open drain signal.
SRAM-like Interface Interrupt. (Active low)
68k-I/F Interrupt. (Active low)
K6 PCI_C/BE0n I/O PCI Bus Command/Byte Enable 0.
L5 PCI_C/BE1n I/O PCI Bus Command/Byte Enable 1.
M1 PCI_C/BE2n I/O PCI Bus Command/Byte Enable 2.
H4 PCI_C/BE3n I/O PCI Bus Command/Byte Enable 3.
P1 PCI_DEVSELn
(MCIF_ACKn)
I/O PCI Device Select. (Active low)
SRAM-like Interface Acknowledge. (Active low)
68k-I/F Acknowledge. (Active low)
M2 PCI_FRAMEn
(MCIF_REn/
MCIF_R_nW)
I/O PCI Cycle Frame. (Active low)
SRAM-like Interface Read Enable. (Active low)
68k-I/F Read/Write enable. Ex-CPU drives this signal to 1 for aread operation and 0 for a write oper-
ation.
G2 PCI_GNTn I PCI Grant. (Active low)
J3 PCI_IDSEL I PCI Initialization Device Select.
N1 PCI_IRDYn I/O PCI Initiator Ready. (Active low)
N5 PCI_PERRn I/O PCI Parity Error. (Active low)
M4 PCI_PAR
(MCIF_LITTLE_ENDIA
N)
I/O PCI Parity.
SRAM-like Interface Endianness setting. When set to 1, the interface will be byte swapped (based
on 4 bytes). When set to 0, the interface byte order will not be changed.
68k-I/F Endianness setting. When set to 1, the interface will be byte swapped (based on 4 bytes).
When set to 0, the interface byte order will not be changed.
F1 PCI_REQn O PCI Request. (Active low)
P4 PCI_SERRn O PCI System Error. (Active low)
P2 PCI_STOPn
(MCIF_CSn)
I/O PCI Stop. (Active low)
SRAM-like Interface Chip Select. (Active low)
68k-I/F Chip Select. (Active low)
M3 PCI_TRDYn
(MCIF_Wen/
MCIF_STRBn)
I/O PCI Target Ready. (Active low)
SRAM-like Interface Chip Select. (Active low)
68k-I/F Strobe Signal. (Active low)
Note: Please note that PCI address/data line sequencing does not match SRAM or 68K mode. For example PCI_AD [6] is multiplexed with MCIF_D
[7]. Signals with mismatching sequence are highlighted in RED.
Please be extra cautious with routing data/address line correctly on PCB.
F5 PCI_AD [31] I/O PCI Address/Data 31.
G3 PCI_AD [30] I/O PCI Address/Data 30.
G1 PCI_AD [29] I/O PCI Address/Data 29.
H3 PCI_AD [28] I/O PCI Address/Data 28.
H1 PCI_AD [27] I/O PCI Address/Data 27.
H5 PCI_AD [26] I/O PCI Address/Data 26.
H2,J4,
J1, K4,
J2, K1,
L1, L3
PCI_AD [25-16]
(MCIF_A [11-2])
I/O PCI Address/Data 25-16.
SRAM-Like or 68k-I/F Address 11-2.
P3, M5,
P5, N6,
P6, L6,
M6, N7,
P7, L7,
M8, K7,
P8, L8,
N8, K8
PCI_AD [15-0]
(MCIF_D [15-0])
I/O PCI Address/Data 15-0.
SRAM-Like or 68k-I/F Data 15-0.
Note: Please note that PCI address/data line sequencing does not match SRAM or 68K mode. For example PCI_AD [6] is multiplexed with MCIF_D
[7].
External DMA
Pin No. Pin Name I/O Pin Function