MB86292
6
Notes :
The host interface transfers data signals at a fixed width of 32 bits.
There are 23 lines for address signals handled in double words (32 bits) and 32 Mbytes of address space.
The external bus can be used at an operating frequency of 100 MHz maximum.
The RDY signal at the low level sets the ready state in the SH4 or V832 mode; the signal at the low level
sets the wait state in the SH3 mode. Note that the RDY signal is a tristate output signal synchronized to the
rise of BCLKI.
The host interface supports DMA transfer using an external DMA controller.
The host interface generates a host processor interrupt signal.
The RESET pin requires low level input of at least 300
μ
s after setting "S" (PLL reset signal) to high level.
Fix the TEST signal at high level.
In the V832 mode, connect the following pins as specified :
ORCHID Pin Name
Video Output Interface Pins
Pin Name
Input/output
Notes :
The video output interface outputs RGB pieces of five-bit display data by default. It can output RGB pieces
of eight-bit display data depending on conditions. R0-2, G0-2, and B0-2 can be output to MD61-MD63,
MD58-MD60, and MD58-MD60, respectively, by fixing RGBEN to 0. When eight-bit RGB output is selected,
only the 32-bit memory bus width mode can be used.
Using an additional external circuit, the video output interface can generate composite video signals.
The video output interface can provide display synchronized with external video. The mode for
synchronization with the DCLKI signal can be selected as well as the mode for synchronization with a set
dot clock as for normal display.
The HSYNC and VSYNC signals must be pulled up outside the LSI as they enter the input state upon reset.
The GV signal serves to switch between graphics and video for chroma keying. The pin outputs a low level
signal to select video.
V832 Signal Name
A24
MWR
DTACK
TC
DRACK
DMAAK
Function
DCLKO
Output
Display dot clock signal output
DCLKI
Input
Dot clock signal input
HSYNC
Input/output
Horizontal sync signal output
Horizontal sync signal input in external synchronization mode
VSYNC
Input/output
Vertical sync signal output
Vertical sync signal input in external synchronization mode
CSYNC
Output
Composite sync signal output
DISPE
Output
Display effective period signal
GV
Output
Graphics/video select signal
R3-R7
Output
Digital video (R) signal output
G3-G7
Output
Digital video (G) signal output
B3-B7
Output
Digital video (B) signal output
RGBEN
Input
RGB2-0 output/memory bus (MD63-55) select signal