HARDWARE DESCRIPTION
M68HC11EVBU/D
5-3
5.2.2
Memory
The EVBU memory map is a single map design reflecting the resident MC68HC11E9 MCU
device. The EVBU is configured for single-chip mode of operation, but can be reconfigured for
expanded-multiplexed, special-bootstrap, or special-test modes of operation. Refer to the
MC68HC11E9 HCMOS Single-Chip Microcontroller Advanced Information Data Book
(MC68HC11E9/D) or Programming Reference Guide (MC68HC11E9RG/AD) for the specific
memory map information on the four modes of operation.
5.2.3
Real-Time Clock + RAM with Serial Interface
An HCMOS real-time clock/calendar, 32 x 8 static RAM, and a synchronous serial interface for
MCU communications is accomplished via a user-supplied MC68HC68T1 device (U5). Refer to
the MC68HC68T1 Real-Time Clock plus RAM with Serial Interface data sheet
(MC68HC68T1/D) for additional device information.
5.2.4
Terminal I/O Port Interface
The EVBU uses a +5 volt RS-232C driver/receiver device (U4) to communicate to a terminal via
the EVBU terminal I/O port. The terminal I/O port baud rate defaults to 9600 baud via the MCU
SCI. This baud rate can be changed by software by reprogramming the MCU BAUD register.
The terminal I/O port is also used as a host computer I/O port for downloading Motorola S-
records via BUFFALO monitor commands.
Содержание M68HC11EVBD
Страница 4: ......
Страница 92: ...HARDWARE DESCRIPTION 5 4 M68HC11EVBU D ...
Страница 101: ...SUPPORT INFORMATION M68HC11EVBU D 6 9 Figure 6 2 EVBU Schematic Diagram Sheet 1 of 3 ...
Страница 102: ...SUPPORT INFORMATION 6 10 M68HC11EVBU D ...
Страница 103: ...SUPPORT INFORMATION M68HC11EVBU D 6 11 Figure 6 2 EVBU Schematic Diagram Sheet 2 of 3 ...
Страница 104: ...SUPPORT INFORMATION 6 12 M68HC11EVBU D ...
Страница 105: ...SUPPORT INFORMATION M68HC11EVBU D 6 13 Figure 6 2 EVBU Schematic Diagram Sheet 3 of 3 ...
Страница 106: ...SUPPORT INFORMATION 6 14 M68HC11EVBU D ...