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PDF ST72621L4 Data sheet ( Hoja de datos )
| Número de pieza | ST72621L4 | |
| Descripción | LOW SPEED USB 8-BIT MCU | |
| Fabricantes | STMicroelectronics | |
| Logotipo |  |
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ST7262xxx
Low speed USB 8-bit MCU with 3 endpoints, Flash or
ROM memory, LVD, WDG, 10-bit ADC, 2 timers, SCI, SPI
Features
■ Memories
– 8 or 16 Kbyte Program memory
(ROM or Dual voltage FLASH)
with read-write protection
– In-Application and In-Circuit Programming for
FLASH versions
– 384 to 768 bytes RAM (128-byte stack)
■ Clock, Reset and Supply Management
– Enhanced Reset System (Power On Reset)
– Low Voltage Detector (LVD)
– Clock-out capability
– 6 or 12 MHz Oscillator (8, 4, 2, 1 MHz internal
frequencies)
– 3 Power saving modes
■ USB (Universal Serial Bus) Interface
– DMA for low speed applications compliant
with USB specification (version 2.0):
– Integrated 3.3V voltage regulator and trans-
ceivers
– Suspend and Resume operations
– 3 Endpoints
■ Up to 31 I/O Ports
– Up to 31 multifunctional bidirectional I/O lines
– Up to 12 External interrupts (3 vectors)
– 13 alternate function lines
– 8 high sink outputs
(8 [email protected] V/20 [email protected] V)
– 2 true open drain pins (N buffer 8 [email protected] V)
■ 3 Timers
– Configurable watchdog timer (8 to 500 ms
timeout)
– 8-bit Auto Reload Timer (ART) with 2 Input
Captures, 2 PWM outputs and External Clock
– 8-bit Time Base Unit (TBU) for generating pe-
riodic interrupts cascadable with ART
Device Summary
SO20
PDIP20
SO34 shrink
PDIP32 shrink
LQFP44
PDIP42 shrink
■ Analog Peripheral
– 10-bit A/D Converter with up to 8 input pins.
■ 2 Communications Interfaces
– Asynchronous Serial Communication inter-
face
– Synchronous Serial Peripheral Interface
■ Instruction Set
– 8-bit data manipulation
– 63 basic instructions
– 17 main addressing modes
– 8 x 8 unsigned multiply instruction
– True bit manipulation
■ Nested interrupts
■ Development Tools
– Full hardware/software development package
Features
Program memory - Kbytes
RAM (stack) - bytes
Peripherals
Serial I/O
I/Os
Operating Supply
Operating Temperature
Packages
ST72623F2
ST72621K4
ST72622L2
ST72621L4
ST72621J4
8 16 8 16 16
384 (128)
768 (128)
384 (128)
768 (128)
768 (128)
USB, Watchdog, Low Voltage Detector, 8-bit Auto-Reload timer, Timebase unit, A/D Converter
-
SPI + SCI
SPI
SPI + SCI
11 21 23 31
4.0V to 5.5V (Low voltage 3.0V to 5.5V ROM versions available)
0°C to +70°C
PDIP20/SO20
PDIP32
SO34
PDIP42/LQFP44
June 2009
Doc ID 6996 Rev 5
1/139
1
1 page  
2 PIN DESCRIPTION
Figure 2. 44-pin LQFP and 42-Pin SDIP Package Pinouts
ST7262xxx
VPP
PD1
PD0
PC7
MOSI / PC6
IT12 / MISO / PC5
IT11 / SS / PC4
IT10 / SCK / PC3
IT9 / PC2
OSCIN
OSCOUT
44 43 42 41 40 39 38 37 36 35 34
1 33
2 32
3 31
4 30
5 29
6 28
7 27
8 26
9 25
10 24
11 23
12 13 14 15 16 17 18 19 20 21 22
RESET
PA0 / AIN0 / IT1 / USBOE
PA1 / AIN1 / IT2
PA2 / AIN2 / IT3
PA3 / AIN3 / IT4
PA4 / AIN4
PA5 / AIN5
PA6 / AIN6
PA7 / AIN7
PB0 (HS) / MCO
PB1 (HS) / RDI
PD6
PD5
PD4
PD3
PD2
VPP
PD1
PD0
PC7
MOSI / PC6
IT12 / MISO / PC5
IT11 / SS / PC4
IT10 / SCK / PC3
IT9 / PC2
OSCIN
OSCOUT
VSS
VDD
PC1
PC0
IT8 / PWM1 / PB7 (HS)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
* Pin 39 of the LQFP44 package
must be left unconnected.
42 VDDA
41 USBVCC
40 USBDP
39 USBDM
38 VSSA
37 RESET
36 PA0 / AIN0 / IT1 / USBOE
35 PA1 / AIN1 / IT2
34 PA2 / AIN2 / IT3
33 PA3 / AIN3 / IT4
32 PA4 / AIN4
31 PA5 / AIN5
30 PA6 / AIN6
29 PA7 / AIN7
28 PB0 (HS) / MCO
27 PB1 (HS) / RDI
26 PB2 (HS) / TDO
25 PB3 (HS) / ARTCLK
24 PB4 (HS) / ARTIC1 / IT5
23 PB5 (HS) / ARTIC2 / IT6 / ICCCLK
22 PB6 (HS) / PWM0 / IT7 / ICCDATA
Doc ID 6996 Rev 5
5/139
5 Page 
ST7262xxx
3 REGISTER & MEMORY MAP
As shown in the Figure 7, the MCU is capable of
addressing 64K bytes of memories and I/O regis-
ters.
The available memory locations consist of 64
bytes of register locations, 768 bytes of RAM and
up to 16 Kbytes of user program memory. The
RAM space includes up to 128 bytes for the stack
from 0100h to 017Fh.
The highest address bytes contain the user reset
and interrupt vectors.
Figure 7. Memory Map
0000h
003Fh
0040h
HW Registers
(see Table 2)
384 Bytes RAM
768 Bytes RAM
033Fh
0340h
BFFFh
C000h
E000h
Reserved
Program Memory
16 KBytes
8 KBytes
FFDFh
FFE0h
Interrupt & Reset Vectors
(see Table 6)
FFFFh
IMPORTANT: Memory locations marked as “Re-
served” must never be accessed. Accessing a re-
served area can have unpredictable effects on the
device.
0040h
00FFh
017Fh
01BFh
Short Addressing
RAM (zero page)
192 Bytes
16-bit Addressing
RAM
or Stack
(128 Bytes)
16-bit Addressing
RAM
64 Bytes
0040h
00FFh
017Fh
033Fh
Short Addressing
RAM (zero page)
192 Bytes
16-bit Addressing
RAM
or Stack
(128 Bytes)
16-bit Addressing
RAM
448 Bytes
Doc ID 6996 Rev 5
11/139
11 Page | ||
| Páginas | Total 30 Páginas | |
| PDF Descargar | [ Datasheet ST72621L4.PDF ] | |
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