HD6473644

Notes: 1. Permanent damage may occur to the chip if maximum ratings are exceeded. Normal operation should be under the conditions specified in Electrical Characteristics.
Exceeding these values can result in incorrect operation and reduced reliability.
2. The voltage at the FVPP and TEST pins should not exceed 13 V, including peak overshoot.

The H8/300L Series is a series of single-chip microcomputers (MCU: microcomputer unit), built around the high-speed H8/300L CPU and equipped with peripheral system functions on-chip. Within the H8/300L Series, the H8/3644 Group of microcomputers are equipped with a UART (Universal Asynchronous Receiver/Transmitter). Other on-chip peripheral functions include five timers, a 14-bit pulse width modulator (PWM), two serial communication interface channels, and an A/D converter, providing an ideal configuration as a microcomputer for embedding in highlevel control systems. In addition to the mask ROM version, the H8/3644 is also available in a ZTAT™*1 version with on-chip user-programmable PROM, and an F-ZTAT™*2 version with onchip flash memory that can be programmed on-board. Table 1 summarizes the features of the H8/3644 Group.