參數(shù)資料
型號: MTV012A
廠商: Electronic Theatre Controls, Inc.
英文描述: 8051 Embedded CRT Monitor Controller Mask Version
中文描述: CRT顯示器8051嵌入式控制器掩模版
文件頁數(shù): 6/14頁
文件大?。?/td> 102K
代理商: MTV012A
MYSON
TECHNOLOGY
MTV012A
MTV012A Revision 1.1 12/23/1998
6/14
5
6
7
8
9
10
11
12
60.53
66.67
70.069
70.08
72
72.378
72.7
87
102h / 258
0EAh / 234
0DEh / 222
0DEh / 222
0D9h /217
0D7h / 215
0D6h / 214
0B3h / 179
183h / 387
15Fh / 351
14Eh / 334
14Eh / 334
145h / 325
143h / 323
142h / 322
10Dh / 269
*1. The V-Freq output (VF8 - VF0) is valid.
*2. The tolerance deviation is + 1 LSB.
4.3 H/V Present Check
The H present function checks the input HSYNC pulse; the Hpre flag is set when HSYNC is over 10KHz
or cleared when HSYNC is under 10Hz. The V present function checks the input VSYNC pulse; the Vpre
flag is set when VSYNC is over 40Hz or cleared when VSYNC is under 10Hz. The control bit "PREFS"
selects the time base for these functions. The HPRchg interrupt is set when the Hpre value changes.
The VPRchg interrupt is set when the Vpre/CVpre values change. However, the CVpre flag interrupt
may be disabled when S/W disables the composite function.
4.4 H/V Polarity Detection
The polarity functions detect the input HSYNC/VSYNC high and low pulse duty cycle. If the high pulse
duration is longer than that of the low pulse, the negative polarity is asserted; otherwise, positive polarity
is asserted. The HPLchg interrupt is set when the Hpol value changes. The VPLchg interrupt is set when
the Vpol value changes.
4.5 Output HBLANK/VBLANK Control and Polarity Adjustment
HBLANK is the MUX output of HSYNC and the self-test horizontal pattern. The VBLANK is the MUX
output of VSYNC, CVSYNC and the self-test vertical pattern. The MUX selection and output polarity are
S/W controllable. The VBLANK output is cut off when VSYNC frequency is over 200Hz or 133Hz
depends on 8MHz/12MHz OSC selection. HBLANK/VBLANK shares the output pin with P4.1/ P4.0.
4.6 Self-Test Pattern Generator
This generator can generate 4 display patterns for testing purposes: positive cross-hatch, negative
cross-hatch, full white and full black (shown in the following figure). It was originally designed to support
monitor manufacturers to do a burn-in test, or offer the end-user a reference to check the monitor. The
generator's output STOUT shares the output pin with P4.2.
Display Region
Self-Test Patterns (1)
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