ST72C334J4T6 STMicroelectronics, ST72C334J4T6 Datasheet - Page 117

• Manufacturer Part Number: ST72C334J4T6
• Description: MCU 8BIT FLASH SPI SCI 44TQFP
• Manufacturer: STMicroelectronics
• Series: ST7r

Specifications of ST72C334J4T6

• Core Processor: ST7
• Core Size: 8-Bit
• Speed: 16MHz
• Connectivity: SCI, SPI
• Peripherals: LVD, POR, PWM, WDT
• Number Of I /o: 32
• Program Memory Size: 16KB (16K x 8)
• Program Memory Type: FLASH
• Eeprom Size: 256 x 8
• Ram Size: 512 x 8
• Voltage - Supply (vcc/vdd): 3.2 V ~ 5.5 V
• Data Converters: A/D 6x8b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 44-TQFP, 44-VQFP
• Processor Series: ST72C3x
• Core: ST7
• Data Bus Width: 8 bit
• Data Ram Size: 512 B
• Interface Type: SCI, SPI
• Maximum Clock Frequency: 8 MHz
• Number Of Programmable I/os: 32
• Number Of Timers: 4 bit
• Operating Supply Voltage: 3.2 V to 5.5 V
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• Development Tools By Supplier: ST7C334-INDART, ST7MDT2-EPB2/US
• Minimum Operating Temperature: - 40 C
• On-chip Adc: 8 bit
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 497-4838

CLOCK AND TIMING CHARACTERISTICS (Cont’d)
16.5.3 Crystal and Ceramic Resonator Oscillators
The ST7 internal clock can be supplied with four
different Crystal/Ceramic resonator oscillators. All
the information given in this paragraph are based
on characterization results with specified typical
external components. In the application, the reso-
nator and the load capacitors have to be placed as
16.5.3.1 Typical Crystal Resonators
Figure 68. Application with a Crystal Resonator
Notes:
1. Resonator characteristics given by the crystal manufacturer.
2. t
quick V
3. The oscillator selection can be optimized in terms of supply current using an high quality resonator with small R
Refer to crystal manufacturer for more details.
Config.
f
R
C
C
i
Option
2
OSC
Byte
Symbol
F
L1
L2
MP
MS
HS
LP
SU(OSC)
DD
ramp-up from 0 to 5V (<50 s).
is the typical oscillator start-up time measured between V
SS3-400-30-30/30
SS3-800-30-30/30
S-200-30-30/50
SS3-1600-30-30/30
Oscillator Frequency
Feedback resistor
Recommended load capacitance ver-
sus equivalent serial resistance of the
crystal or ceramic resonator (R
OSC2 driving current
Reference
C
L2
Parameter
C
L1
3)
16MHz
Freq.
2MHz
4MHz
8MHz
RESONATOR
S
)
f
f
f
f
OSC
OSC
OSC
OSC
=[±30ppm
=[±30ppm
=[±30ppm
=[±30ppm
LP: Low power oscillator
MP: Medium power oscillator
MS: Medium speed oscillator
HS: High speed oscillator
R
R
R
R
V
V
OSC1
OSC2
DD
IN
S
S
S
S
=200
=200
=200
=100
=V
=5V
SS
close as possible to the oscillator pins in order to
minimize output distortion and start-up stabiliza-
tion time. Refer to the crystal/ceramic resonator
manufacturer for more details (frequency, pack-
age, accuracy...).
25°C
25°C
25°C
25°C
Characteristic
Conditions
,±30ppm
,±30ppm
,±30ppm
,±30ppm
R
F
DD
ST72334J/N, ST72314J/N, ST72124J
=2.8V and the fetch of the first instruction (with a
LP oscillator
MP oscillator
MS oscillator
HS oscillator
LP oscillator
MP oscillator
MS oscillator
HS oscillator
Ta
Ta
Ta
Ta
i
2
, Typ. R
, Typ. R
, Typ. R
, Typ. R
1)
S
S
S
S
=200
=60
=25
=15
Min
110
180
400
>2
>4
>8
20
38
32
18
15
40
1
ST72XXX
f
OSC
[pF]
C
33
33
33
33
Max
100
190
360
700
L1
16
40
56
46
26
21
2
4
8
[pF]
C
34
34
34
34
L2
117/153
t
[ms]
S
MHz
10~15
Unit
SU(osc)
2.5~3
1~1.5
7~10
k
pF
value.
A
2)