Hitachi HV-F31F - Manual (Page 47)

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a) FOCUS GATE (SIZE) (CSR: F200 00F4 h)
Setting for focus data output area size.
-ON-
Setting value 820xx0yyh
xx: 00h to FFh (H size)
yy: 00h to FFh (V size)
b) FOCUS GATE (POSITION) (CSR: F200 00F8 h)
Setting for focus data output area position.
-ON-
Setting value 820xx0yy h
xx: 00h to FFh (H position)
yy: 00h to FFh (V position)
c) FOCUS DETECTION (CSR：F200 00FC h) (read only)
Return focus data.
-DATA-
00000000 h(MIN) to FFFFFFFF h(MAX)
(8) INDICATOR (CSR: F200 0100 h)
Each type of indicator is displayed.
-OFF-
Setting value 80000000 h
-ON-
Setting value 8200000x h x：1- display WHITE GATE、2- display FOCUS GATE