CL-PS7500FE View Datasheet(PDF) - Cirrus Logic

Part Name

Description

Manufacturer

CL-PS7500FE

System-on-a Chip for Internet Appliance

Cirrus Logic 

CL-PS7500FE

System-on-a-Chip for Internet Appliance

10.3.64 VIDCR (0x1E0) — Video DMA Control

76543210

D1E1 0 0 0 0

This register allows overall control for video DMA. Bit 7 selects between dual- and single-panel modes for

LCD driving; bit 5 enables video DMA.

NOTE: For driving normal CRT displays, set bit 7 to ‘0’.

D Dual-panel mode

E enable video/cursor DMA

Write

bit[7]

0

1

normal

Dual-panel mode

bit[6] ignored

bit[5]

0

1

disable

enable DMA

bits[4:0] ignored

Read

bits[7, 5] return above values

bit[6] always reads back ‘1’, DRAM mode

bits[4:0] reads as ‘10000’ (binary), indicates qword transfer

Reset

set to ‘0’ (disabled, Normal mode)

106

MEMORY AND I/O PROGRAMMERS’ MODEL

ADVANCE DATA BOOK v2.0

June 1997

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