M37207M8-059SP datasheet(65/121 Pages) MITSUBISHI

65 / 121 page

MITSUBISHI MICROCOMPUTERS

M37207MF-XXXSP/FP, M37207M8-XXXSP

M37207EFSP/FP

SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER for VOLTAGE SYNTHESIZER

and ON-SCREEN DISPLAY CONTROLLER

Fig. 60. Display Counter

Fig. 61. Timing of CRT Interrupt Request and Display Counter Value

The display block counter counts the number of times the display of

a block has been completed, and its contents are incremented by 1

each time the display of one block is completed.

To provide multi-line display, enable CRT interrupts by clearing the

interrupt disable flag to “0” and setting the CRT interrupt enable bit

(bit 4 of address 00FE16) to “1.” After that, process the following

sequence within the CRT interrupt processing routine:

ead the value of the display block counter.

The block for which display is terminated (i.e., the cause of CRT

interrupt generation) can be determined by the value read in

Replace the display character data and vertical display position of

that block with the character data (contents of CRT display RAM)

and vertical display position (contents of vertical position register)

to be displayed next.

Figure 60 shows the structure of the display block counter.

Block 1

Block 2

Count value

Block 3

Block 1’

Interrupt position

b7 b6 b5 b4 b3 b2 b1 b0

Display block counter (CBC) [Address 00EB 16]

Name

Functions

After reset

R W

Display Block Counter

Number of blocks which are being displayed or has

displayed

(Incremented each time a block is displayed)

Indeterminate RW

Nothing is assigned. These bits are write disable bits.

When these bits are read out, the values are “0.”

R—

M37207M8-059SP Datasheet(PDF) 65 Page - Mitsubishi Electric Semiconductor

M37207M8-059SP Datasheet(HTML) 65 Page - Mitsubishi Electric Semiconductor

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 ...More

Datasheet Download

Link URL