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參數(shù)資料
| 型號： | UPD784916B |
| 廠商： | NEC Corp. |
| 英文描述： | 16-BIT SINGLE-CHIP MICROCONTROLLERS |
| 中文描述： | 16位單晶片微控制器 |
| 文件頁數(shù)： | 33/86頁 |
| 文件大小： | 384K |
| 代理商： | UPD784916B |
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μ
PD784915B, 784916B
33
3.6 Super Timer Unit
The
μ
PD784916B is provided with a super timer unit that consists of the timers shown in Table 3-6.
Table 3-6. Configuration of Super Timer Unit
Unit Name
Timer 0
Free running
counter
Timer 1
Timer 2
Timer 4
Timer 5
Up/down
counter
PWM output
unit
Timer/Counter
TM0
(16-bit timer)
EC
(8-bit counter)
FRC
(22-bit counter)
TM1
(16-bit timer)
TM3
(16-bit timer)
EDV
(8-bit counter)
TM2
(16-bit timer)
TM4
(16-bit timer)
TM5
(16-bit timer)
UDC
(5-bit counter)
-
Resolution
1
μ
s
-
125 ns
1
μ
s
1
μ
s or 1.1
μ
s
-
1
μ
s
2
μ
s
2
μ
s
-
-
Maximum
Count Time
65.5 ms
-
524 ms
65.5 ms
65.5 ms or
71.5 ms
-
65.5 ms
131 ms
131 ms
-
-
Register
CR00
CR01
CR02
ECC0, ECC1,
ECC2, ECC3
CPT0
CPT1
CPT2
CPT3
CPT4, CPT5
CR10
CR11
CR12
CR13
CR30, CR31
CPT30
EDVC
CR20
CR40
CR41
CR50
UDCC
PWM0, PWM1,
PWM5
PWM2, PWM3,
PWM4
Remark
Controls delay of video head switching signal
Controls delay of audio head switching signal
Controls pseudo V
SYNC
output timing
Creates internal head switching signal
Detects reference phase (to control drum phase)
Detects phase of drum motor (to control drum
phase)
Detects speed of drum motor (to control drum
speed)
Detects speed of capstan motor (to control
speed of capstan motor)
Detects remaining tape for reel FG
Playback: Creates internal reference signal
Recording: Buffer oscillator in case V
SYNC
is
missing
Controls RECCTL output timing
Detects phase of capstan motor (to control
capstan phase)
Controls V
SYNC
mask as noise prevention
measures
Controls duty detection timing of PBCTL sig-
nal
Measures cycle of PBCTL signal
Divides CFG signal frequency
Can be used as interval timer (to control sys-
tem)
Detects duty of remote controller signal (to
decode remote controller signal)
Measures cycle of remote controller signal (to
decode remote controller signal)
Can be used as interval timer (to control sys-
tem)
Creates linear tape counter
16-bit resolution (carrier frequency: 62.5 kHz)
8-bit resolution (carrier frequency: 62.5 kHz)
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