M65761FP Просмотр технического описания (PDF) - Renesas Electronics

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M65761FP

QM-Coder

Renesas Electronics 

M65761FP

(2) Parameter setup register (WR)

1) External context mode

(Address: 1)

d7

d4

d0

PARA_REG:

C0

LC

0

0

d6 (LC):

d7 (C0):

Condition of taking in the input from the external context are selected.

(0: through output, 1: latch input)

When this bit is set to 1, the CX0 to CX11 of the context input is latched once using the transfer

clock. ("XCLK")

When this bit is set to 1, CX0 is selected.

(0: CX0 external input, 1: CX0 internal feedback)

2) Internal context mode

(Address: 1)

d7

d6

d5

d4

d0

PARA_REG:

AT

TM

AT

d0 to 4 (AT<0> to AT<4>):

d5 (TM):

d6, d7 (AT<5>, AT<6>):

AT pixel position lower 5 bits. (see figure 2)

Template select (0: 3-line template, 1: 2-line template)

AT pixel position upper 2 bits (the 6th and 7th bits)

Example:

d7

d4

d0

3-line template, AT = 4:

0

0

0

0

0

1

0

0

d7

d4

d0

2-line template, AT = 48:

0

1

1

1

0

0

0

0

Note:

The AT pixel position at time of the internal context mode is set up by using all the AT<6:0> (0 to 127).

When the default position (when the AT pixels are not used) is used, AT is set to 0.

When the 2-line template is used, AT should not be set to 1 to 4. In case of the 3-line template, AT = 1 to 2 is

not allowed.

(3) Command register (W)

(Address: 2)

d7

CMD_REG:

0

d3

d0

JP

RC

JC

IC

d0 (IC):

d1 (JC):

This command starts initialization of context table RAM (1: start initialization)

When this bit goes 1, the context table RAM initialization starts. This bit returns to 0 automatically when

the initialization is completed.

Processing (coding/decoding/through) start/end command (1: start processing, 0: end processing)

When this bit goes 1, processing (coding/decoding/through) starts.

This bit returns to 0 automatically when processing of the number of set lines is finished during the

selection of end of termination.

And if this JC bit is made 0 and inputting the image data is stopped during the coding process, the coding is

stopped (flushed) even if the set lines are not filled. Moreover, if this bit made 0 during decoding and no

more coded data is coming in, it is assumed that the "00" of the coded data came in and the preset lines have

been processed. However, in case of the multi-striped coding, processing should not end by making this bit

"0" except in case of last stripe.

REJ03F0234-0200 Rev.2.00 Sep 14, 2007

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