ST7261
LOW SPEED USB 8-BIT MCU WITH 3 ENDPOINTS,
ROM MEMORY, LVD, WDG, TIMER
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Memories
鈥?4K Program memory (ROM) with read-write
protection.
In-Circuit programming for Flash versions
鈥?256 bytes RAM memory (128-byte stack)
Clock, Reset and Supply Management
鈥?Enhanced Reset System (Power On Reset)
鈥?Low Voltage Detector (LVD)
鈥?Clock-out capability
鈥?6 or 12 MHz Oscillator (8, 4, 2, 1 MHz internal
freq.)
鈥?3 Power saving modes: Halt, Wait and Slow
USB (Universal Serial Bus) Interface
鈥?DMA for low speed applications compliant
with USB 1.5 Mbs specification (v 1.1) and
USB HID specification (v 1.0):
鈥?Integrated 3.3V voltage regulator and trans-
ceivers
鈥?Suspend and Resume operations
鈥?3 Endpoints
11 I/O Ports
鈥?11 multifunctional bidirectional I/O lines
鈥?Up to 7 External interrupts (2 vectors)
鈥?8 high sink outputs (8mA@0.4 V/20mA@1.3)
2 Timers
鈥?Configurable watchdog timer (8 to 500ms
timeout)
鈥?8-bit Time Base Unit (TBU) for generating pe-
riodic interrupts
SO20
PDIP20
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Instruction Set
鈥?8-bit data manipulation
鈥?63 basic instructions
鈥?17 main addressing modes
鈥?8 x 8 unsigned multiply instruction
鈥?True bit manipulation
Nested interrupts
Development Tools
鈥?Full hardware/software development package
Device Summary
Features
Program memory - bytes
RAM (stack) - bytes
Peripherals
I/Os
Operating Supply
CPU Frequency
Operating Temperature
Packages
ST72611F1
4K ROM
256 (128)
USB, Watchdog, Low Voltage Detector, Time Base Unit
11
4.0V to 5.5V
Up to 8 MHz (with 6 or 12 MHz oscillator)
0掳C to +70掳C
PDIP20/SO20
Rev. 2.1
June 2003
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