Texas Instruments lists the MSP430F6630IPZR as obsolete.
Core and memory — 20 MHz CPUXV2 with 128 KB flash
Built around the 16-bit MSP430 CPUXV2 RISC core clocked at 20 MHz. The hardware multiplier and DMA controller offload data movement from the CPU, keeping throughput available for the application loop. 128 KB on-chip flash (128K x 8) with 18 KB SRAM (18K x 8). The flash is organised for byte/word write and sector erase — budget sector-erase time into any field firmware update routine.
Connectivity and peripheral set — USB 2.0 plus serial
Integrates a USB 2.0 full-speed module alongside I²C, SPI, UART/USART, IrDA, and LINbus. The USB PHY and transceiver are on-chip; no external USB controller is needed for data-logging or HID-class endpoints.
Package and temperature grade
Housed in a 100-lead LQFP with a 14x14 mm body and 0.50 mm pitch. The exposed pad on the bottom side provides a low-thermal-resistance path to the PCB copper pour — connect it to the ground plane with at least four thermal vias for adequate heat spreading. The internal oscillator is trimmed across this range; for tighter timing accuracy, an external crystal on the LFXT or HFXT pins is recommended.