M65762FP Просмотр технического описания (PDF) - Renesas Electronics

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M65762FP

QM-Coder

Renesas Electronics 

M65762FP

Application

• OA equipment including facsimile, copier and printer

• Digital and amusement equipment for the purpose of reducing memory

Block Diagram

PD0 to 31

PDRQ 48

PDAK* 49

PDRD* 50

PDWR* 51

PRDY* 54

PTIM* 55

PXCK* 56

PXCKO* 59

SVID* 57

RVID* 58

Pixel data

CD0 to 31

108 CDRQ

109 CDAK*

110 CDRD*

111 CDWR*

132 RESET*

135 HCS*

HA0 to 3

134 HWR*

133 HRD*

HD0 to 7

112 INTR

129 MCLK

(Asterisk "*" indicates negative logic.)

Description on Block Functions

(1) Host bus I/F block

This bus is used to set command parameters and load the status between the MPU and this block. It is 8-bit bus.

This block is also available to load and store of context table RAM via the host bus.

(2) Code data I/F block

Bus for input/output of coding data. For the bus width, 32 bits, 16 bits or 8 bits can be selected.

Image data can also be transferred (in through mode) between the image data I/F and this block via built-in line

memory. FIFO buffer for 16 bytes are provided in the code data I/F block.

(3) Image data I/F block

The Image data I/F is used for input/output of binary image data. The 32-/16-bit parallel I/F or serial I/F can be

selected. Selection of the serial I/F transfers data in units of 1 pixel in synchronization with the line, using the

handshake signal (PRDY*, PTIM*).

Selection of parallel I/F uses an external DMA controller for DMA transfer (in units of stripe).

The image data I/F provides a function for scale-down of length and breadth by 1/2 in coding and a function for

scale-up of length and breadth by twice in decoding.

(4) Line memory block

4 K-byte memory. This block can be set to a maximum of 8192 pixels/line for 3-line template and can be set to a

maximum of 10240 pixels/line for 2-line template. A line is used for input/output processing of image data to/from

outside and the other lines (2 or 3 lines) are used for encoding/decoding processing. These two processes can be

independently carried out in synchronization with each line.

The contents of line memory can be loaded or stored via the image data I/F or coding data I/F.

(5) Typical prediction block

In the typical prediction mode, compares the encoding/decoding process line agree with the immediately preceding

line and generates pseudo-pixel (SLNTP).

REJ03F0235-0200 Rev.2.00 Sep 14, 2007

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