h8s-2172 Renesas Electronics Corporation., h8s-2172 Datasheet - Page 323

• Manufacturer Part Number: h8s-2172
• Description: Renesas 16-bit Single-chip Microcomputer H8s Family H8s-2100 Series
• Manufacturer: Renesas Electronics Corporation.

This LSI has a serial communication interface for boot mode (SCI) which is on-board
programming mode of flash memory. The SCI can handle asynchronous serial communication.
Serial data communication can be carried out with standard asynchronous communication chips
such as a Universal Asynchronous Receiver/Transmitter (UART) or Asynchronous
Communication Interface Adapter (ACIA). Figure 11.1 shows a block diagram of the SCI.
11.1
• Choice of asynchronous or clocked synchronous serial communication mode
• Full-duplex communication capability
• On-chip baud rate generator allows any bit rate to be selected
• Choice of LSB-first
• Four interrupt sources
• Module stop mode can be set
Asynchronous mode
• Data length: 7 or 8 bits
• Stop bit length: 1 or 2 bits
• Parity: Even, odd, or none
• Receive error detection: Parity, overrun, and framing errors
• Break detection: Break can be detected by reading the RxD pin level directly in case of a
Section 11 Serial Communication Interface for Boot Mode
The transmitter and receiver are mutually independent, enabling transmission and reception to
be executed simultaneously. Double-buffering is used in both the transmitter and the receiver,
enabling continuous transmission and continuous reception of serial data.
Four interrupt sources  transmit-end, transmit-data-empty, receive-data-full, and receive
error  that can issue requests.
framing error
Features
(SCI)
Rev. 2.00, 03/04, page 291 of 534