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Rev. 2.0, 11/00, page 11 of 1037
Type
Symbol
Pin No.
I/O
Name and Function
AN7 to
AN0
18 to 11
Input
Analog input channels 7 to 0:
Analog data input pins. A/D conversion is
started by a software triggering
AN8
AN9
ANA
ANB
19
20
21
22
Input
Analog input channels 8, 9, A and B:
Analog data input pins. A/D conversion is
started by an external, hardware, or software
triggering
A/D
converter
$'75*
24
Input
A/D conversion external trigger input:
Pin for input of an external trigger to start A/D
conversion
AUDIO FF
99
Output
Audio FF:
Output pin for audio head switching signal
VIDEO FF
100
Output
Video FF:
Output pin for video head switching signal
CAPPWM
101
Output
Capstan mix:
12-bit PWM output pin giving result of capstan
speed error and phase error after filtering
DRMPWM
102
Output
Drum mix:
12-bit PWM output pin giving result of drum
speed error and phase error after filtering
Vpulse
110
Output
Additional V pulse:
Three-level output pin for additional V signal
synchronized to the Video FF signal
C.Rotary
/PS0
103
Output,
input/
output
Color rotary signal:
Output pin for color signal processing control
signal in four-head special-effects playback
H.AmpSW
/PS1
104
Output,
input/
output
Head-amp switch:
Output pin for preamplifier output select signal in
four-head special-effects playback. This pin can
also be used as a general port when not used
COMP
/PS2
105
Input,
input/
output
Compare input:
Input pin for signal giving the result of
preamplifier output comparison in four-head
special-effects playback. This pin can also be
used as a general port when not used
CTL (+)
CTL (-)
1
3
Input
/output
CTL head (+) and (-) pins:
I/O pins for CTL signals
Servo
circuits
CTL Bias
4
Input
CTL primary amp bias supply:
Bias supply pin for CTL primary amp
Содержание Hitachi H8S/2191
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Страница 639: ...Rev 2 0 11 00 page 612 of 1037 28 1 2 Block Diagram Figure 28 1 shows a block diagram of the servo circuits...
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