Benchmark ADC16 Datenblatt Seite 120
- Seite / 153
- Inhaltsverzeichnis
- LESEZEICHEN
Bewertet. / 5. Basierend auf Kundenbewertungen
ST72334J/N, ST72314J/N, ST72124J
120/153
CLOCK CHARACTERISTICS (Cont’d)
16.5.4 RC Oscillators
The ST7 internal clock can be supplied with an RC
oscillator. This oscillator can be used with internal
or external components (selectable by option
byte).
Figure 70. Typical Application with RC oscillator
Figure 71. Typical Internal RC Oscillator Figure 72. Typical External RC Oscillator
Notes:
1. Data based on characterization results.
2. Guaranteed frequency range with the specified C
EX
and R
EX
ranges taking into account the device process variation.
Data based on design simulation.
3. Data based on characterization results done with V
DD
nominal at 5V, not tested in production.
4. R
EX
must have a positive temperature coefficient (ppm/°C), carbon resistors should therefore not be used.
5. Important: when no external C
EX
is applied, the capacitance to be considered is the global parasitic capacitance which
is subject to high variation (package, application...). In this case, the RC oscillator frequency tuning has to be done by
trying out several resistor values.
Symbol Parameter Conditions Min Typ Max Unit
f
OSC
Internal RC oscillator frequency
1)
see Figure 71 3.60 5.10
MHz
External RC oscillator frequency
2)
114
t
SU(OSC)
Internal RC Oscillator Start-up Time
3)
2.0
ms
External RC Oscillator Start-up Time
3)
R
EX
=47KΩ, C
EX
=”0”pF
R
EX
=47KΩ, C
EX
=100pF
R
EX
=10KΩ, C
EX
=6.8pF
R
EX
=10KΩ, C
EX
=470pF
1.0
6.5
0.7
3.0
R
EX
Oscillator external resistor
4)
see Figure 72
10 47 KΩ
C
EX
Oscillator external capacitor 0
5)
470 pF
OSC1
OSC2
f
OSC
C
EX
R
EX
EXTERNAL RC
INTERNAL RC
V
REF
+
-
V
DD
Current copy
Voltage generator
C
EX
discharge
ST72XXX
3.2 5.5
VDD [V]
3.8
3.9
4
4.1
4.2
4.3
fosc [MHz]
-40°C
+25°C
+85°C
+125°C
0 6.8 22 47 100 270 470
Cex [pF]
0
5
10
15
20
fosc [MHz]
Rex=10KOhm
Rex=15KOhm
Rex=22KOhm
Rex=33KOhm
Rex=39KOhm
Rex=47KOhm
- ST72334J/N 1
- ST72314J/N, ST72124J 1
- Table of Contents 2
- 2 INTRODUCTION 6
- 3 PIN DESCRIPTION 7
- (N versions) 8
- (J versions) 9
- 4 REGISTER & MEMORY MAP 13
- 5 FLASH PROGRAM MEMORY 17
- 6 DATA EEPROM 18
- Interrupt enable 21
- Latch Access Transfer 21
- 8 CENTRAL PROCESSING UNIT 23
- Half carry 24
- Interrupt mask 24
- Negative 24
- Carry/borrow 24
- 00000001 25
- MAIN CLOCK 26
- CONTROLLER 26
- ■ an external source 30
- ■ an external RC oscillator 30
- LVD reset flag 32
- Clock security syst 32
- interrupt enable 32
- Watchdog reset flag 32
- 10 INTERRUPTS 33
- INTERRUPTS (Cont’d) 34
- Table 5. Interrupt mapping 34
- 11 POWER SAVING MODES 35
- 12 I/O PORTS 39
- Hardware Configuration 41
- OPEN-DRAIN OUTPUT 41
- PUSH-PULL OUTPUT 41
- Data register 8 bits 44
- Option register 8 bits 44
- I/O PORTS (Cont’d) 45
- 13 MISCELLANEOUS REGISTERS 46
- Main clock out selection 47
- CPU clock prescaler 47
- Slow mode select 47
- Must always be cleared 48
- Beep control 48
- SS mode selection 48
- SS internal mode 48
- 14 ON-CHIP PERIPHERALS 49
- Activation bit 50
- 7-bit timer (MSB to LSB) 50
- Watchdog flag 50
- WATCHDOG TIMER (Cont’d) 51
- Time base control 53
- Oscillator interrupt enable 53
- Oscillator interrupt flag 53
- clock speed) with the choice 54
- 16-BIT TIMER (Cont’d) 55
- Beginning of the sequence 56
- Sequence completed 56
- /CC[1:0]) 58
- 16-BIT FREE RUNNING 59
- OLVL2OLVL1 64
- Pulse Width Modulation cycle 65
- Input Capture Flag 1 69
- Output Compare Flag 1 69
- Timer Overflow Flag 69
- Input Capture Flag 2 69
- Output Compare Flag 2 69
- CAPTURE STROBE 77
- VR02131B 77
- Write Collision status 83
- Mode Fault flag 83
- TDRE TC RDRF IDLE OR NF FE 93
- R8 T8 - M WAKE - 94
- TIE TCIE RIE ILIE TE RE RWU 94
- First SCI Prescaler 95
- SCI Transmitter rate divisor 95
- SCI Receiver rate divisor 95
- 8-bit Extended Receive Pres 96
- 8-bit Extended Transmit Pres 96
- CH2 CH1CH3COCO 0 ADON 0 CH0 97
- ■ A/D conversion [duration: t 98
- D7 D6 D5 D4 D3 D2 D1 D0 99
- COCO 0 ADON 0 CH3 CH2 CH1 CH0 99
- 15 INSTRUCTION SET 101
- Relative (Indirect) 103
- INSTRUCTION GROUPS (Cont’d) 105
- 16 ELECTRICAL CHARACTERISTICS 107
- 16.6 MEMORY CHARACTERISTICS 122
- 16.6.2 EEPROM Data Memory 122
- 16.6.3 FLASH Program Memory 122
- R=10k~10MΩ 124
- UNUSED I/O PORT 128
- ADC Accuracy 139
- 17 PACKAGE CHARACTERISTICS 140
- ■ Heraeus: PD945, PD955 143
- ■ Loctite: 3615, 3298 143
- MICROCONTROLLER OPTION LIST 146
- DEVELOPMENT TOOLS (Cont’d) 148
- 18.4 ST7 APPLICATION NOTES 149
- 19 IMPORTANT NOTES 151
- 20 SUMMARY OF CHANGES 152
Verwandte Produkte und Handbücher für Videokonverter Benchmark ADC16
(9 Seiten)© 2020, manymanuals.de. Alle Rechte vorbehalten. | 0.382 s |
Manymanuals.com
Manymanuals.de
Manymanuals.fr
Manymanuals.it
Manymanuals.pl
Manymanuals.cz
Manymanuals.es
Manymanuals-pt.com
Kommentare zu diesen Handbüchern