ADuC7121

Data Sheet Precision Analog Microcontroller, 12-Bit Analog I/O, ARM7TDMI MCU ADuC7121 FEATURES Software-triggered in-circuit reprogrammability Analog input/output 9-channel, 12-bit, 1 MSPS ADC 2 differential pairs with input PGA 7 general-purpose inputs (differential or single-ended) Fully differential and single-ended modes 0 V to VREF analog input range 5 low noise current digital-to-analog converters (IDACs) 250 mA, 200 mA, 45 mA, 80 mA, 20 mA 4 × 12-bit voltage output DACs On-chip voltage reference On-chip temperature sensor Microcontroller ARM7TDMI core, 16-bit/32-bit RISC architecture JTAG port supports code download and debug Clocking options Trimmed on-chip oscillator (±3%) External watch crystal External clock source up to 41.78 MHz On-chip peripherals UART, 2 × I2C and SPI serial I/O 32-pin GPIO port 4× general-purpose timers Wake-up and watchdog timers (WDT) Power supply monitor Vectored interrupt controller for FIQ and IRQ 8 priority levels for each interrupt type Interrupt on edge or level external pin inputs Power Specified for 3 V operation Active mode: 11 mA at 5 MHz, 40 mA at 41.78 MHz Packages and temperature range 7 mm × 7 mm 108-ball CSP_BGA Fully specified for –10°C to +95°C operation Tools Low cost QuickStart development system Full third party support 41.78 MHz PLL with programmable divider Memory 126 kB flash/EE memory, 8 kB SRAM APPLICATIONS Optical modules—tunable laser In-circuit download, JTAG-based debug FUNCTIONAL BLOCK DIAGRAM AVDD 3.3...