W99681CF Datasheet, PDF (46/78 Pages) Winbond – JPEG USB Dual Mode Camera Chip

W99681CF
Power-on Default: 0000H
15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
P7W P6W P5W P4W P3W P2W P1W P0W P7D P6D P5D P4D P3D P2D P1D P0D
Bits 15-8 GPIO[7:0] Direction
0 = Input
1 = Output
Bits 7-0
GPIO[7:0] Data
0 = Low
1 = High
Note. GPIO[7:0] pins are used as A[15:8] to the external microcontroller if used (EXTMCU = 1). This
register does not control on the GPIO[7:0] pins if an external microcontroller is used.
DRAM Timing Control Register (CR03)
Read/Write
Index: 0003H
uC Address: 06H - 07H
Power-on Default: 405DH
15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
R Refresh Cycles DCT T_RP RAS T_RCD
T_RAS
RE T_CAS
Bit 15 Reserved
Bits 14-12 Refresh Cycles
000 = 1 refresh cycle per horizontal scan line
001 = 2 refresh cycles per horizontal scan line
010 = 3 refresh cycles per horizontal scan line
011 = 4 refresh cycles per horizontal scan line
100 = 5 refresh cycles per horizontal scan line
101 = 6 refresh cycles per horizontal scan line
110 = 7 refresh cycles per horizontal scan line
111 = 8 refresh cycles per horizontal scan line
Bit 11
DCT DRAM Data Access
0 = DCT DRAM data access can be interrupted by MCTL when other DRAM request is
active.
1 = DCT DRAM data access cannot be interrupted by MCTL.
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