ST72F621L4M1 STMicroelectronics, ST72F621L4M1 Datasheet - Page 105

• Manufacturer Part Number: ST72F621L4M1
• Description: IC MCU 8BIT LS 16K 34-SOIC
• Manufacturer: STMicroelectronics
• Series: ST7r

Specifications of ST72F621L4M1

• Core Processor: ST7
• Core Size: 8-Bit
• Speed: 8MHz
• Connectivity: SCI, SPI, USB
• Peripherals: DMA, LVD, POR, PWM, WDT
• Number Of I /o: 23
• Program Memory Size: 16KB (16K x 8)
• Program Memory Type: FLASH
• Ram Size: 768 x 8
• Voltage - Supply (vcc/vdd): 4 V ~ 5.5 V
• Data Converters: A/D 8x10b
• Oscillator Type: Internal
• Operating Temperature: 0°C ~ 70°C
• Package / Case: 34-SOIC (7.5mm Width)
• Processor Series: ST72F6x
• Core: ST7
• Data Bus Width: 8 bit
• Data Ram Size: 768 B
• Interface Type: SCI, SPI, USB
• Maximum Clock Frequency: 12 MHz
• Number Of Programmable I/os: 23
• Number Of Timers: 2
• Operating Supply Voltage: 4 V to 5.5 V
• Maximum Operating Temperature: + 70 C
• Mounting Style: SMD/SMT
• Minimum Operating Temperature: 0 C
• On-chip Adc: 10 bit
• For Use With: 497-5046 - KIT TOOL FOR ST7/UPSD/STR7 MCU
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Lead Free Status / Rohs Status: In Transition
• Other names: 497-2112-5

12.5 clOck and timing characteristics
Subject to general operating conditions for V
12.5.1 General Timings
1. Data based on typical application software.
2. Time measured between interrupt event and interrupt vector fetch. Δt
the current instruction execution.
12.5.2 Control timing characteristics
Note 1:
The minimum period t
plus 21 cycles.
Note 2:
Not tested in production, guaranteed by design.
CONTROL TIMINGS
Symbol
Symbol
t
T
t
t
t
c(INST)
f
t
f
OXOV
PORL
WDG
t
OSC
CPU
DDR
t
RSTL
v(IT)
RL
Oscillator Frequency
Operating Frequency
External RESET
Input pulse Width
Internal Power Reset Duration
Reset Pin Output Pulse Width
Watchdog Time-out
Crystal Oscillator
Start-up Time
Power up rise time
Instruction cycle time
Interrupt reaction time
t
v(IT)
= Δt
ILIL
c(INST)
Parameter
should not be less than the number of cycle times it takes to execute the interrupt service routine
Parameter
+ 10 t
CPU
2)
from V
f
cpu
f
f
DD
CPU
CPU
= 8MHz
, f
=8MHz
=8MHz
Doc ID 6996 Rev 5
Conditions
CPU
DD
Conditions
= 0 to 4V
, and T
A
.
c(INST)
is the number of t
65536
Min
8.192
514
1.5
10
20
1.25
Min
250
10
2
2)
Typ.
Value
Typ
30
375
3
CPU
2)
1)
cycles needed to finish
4194304
524.288
Max
100
1500
Max
2.75
12
40
8
12
22
2)
105/139
MHz
MHz
Unit
t
t
t
Unit
t
t
ms
ms
ms
CPU
CPU
CPU
µs
CPU
CPU
μs
ns