sed1374 ETC-unknow, sed1374 Datasheet - Page 351
sed1374
Manufacturer Part Number
sed1374
Description
Sed1374 Embedded Memory Color Lcd Controller
Manufacturer
ETC-unknow
Datasheet
1.SED1374.pdf
(420 pages)
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Epson Research and Development
Vancouver Design Center
4.4 MPC821 Chip Select Configuration
Interfacing to the Motorola MPC821 Microprocessor
Issue Date: 99/01/05
The DRAM on the MPC821 ADS board extends from address 0 through 3F FFFFh, so the
SED1374 is addressed starting at 40 0000h. The SED1374 uses a 64K byte segment of
memory starting at this address, with the first 40K bytes used for the display buffer and the
upper 32 bytes of this memory block used for the SED1374 internal registers.
Chip select 4 is used to control the SED1374. The following options are selected in the base
address register (BR4):
• BA (0:16) = 0000 0000 0100 0000 0 – set starting address of SED1374 to 40 0000h
• AT (0:2) = 0 – ignore address type bits
• PS (0:1) = 1:0 – memory port size is 16 bits
• PARE = 0 – disable parity checking
• WP = 0 – disable write protect
• MS (0:1) = 0:0 – select General Purpose Chip Select module to control this chip select
• V = 1 – set valid bit to enable chip select
The following options were selected in the option register (OR4):
• AM (0:16) = 1111 1111 1100 0000 0 – mask all but upper 10 address bits; SED1374
• ATM (0:2) = 0 – ignore address type bits
• CSNT = 0 – normal CS/WE negation
• ACS (0:1) = 1:1 – delay CS assertion by ½ clock cycle from address lines
• BI = 1 – assert Burst Inhibit
• SCY (0:3) = 0 – wait state selection; this field is ignored since external transfer
• SETA = 1 – the SED1374 generates an external transfer acknowledge using the WAIT#
• TRLX = 0 – normal timing
• EHTR = 0 – normal timing
consumes 4M byte of address space
acknowledge is used; see SETA below
line
X26A-G-010-02
SED1374
Page 19
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