M37702E6BFS Renesas Electronics America, M37702E6BFS Datasheet - Page 360

• Manufacturer Part Number: M37702E6BFS
• Description: EPROM MCU/8BIT CMOS EMULATION CH
• Manufacturer: Renesas Electronics America

Specifications of M37702E6BFS

• Accessory Type: Emulator EPROM MCU
• For Use With/related Products: 7702
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

APPLICATION
17.1 Memory expansion
17–26
17.1.5 Example of I/O expansion
(1) Example of port expansion circuit using M66010FP
Figure 17.1.21 shows an example of a port expansion circuit using the M60010FP. Use 1.923 MHz
or less frequency for Serial I/O transfer clock.
Serial I/O control in this expansion example is described below.
In this example, 8-bit data transmission/reception is performed 3 times by using UART0 and 24-bit
port expansion is realized. Setting of UART0 is described below.
The control procedure is described below.
Figure 17.1.22 shows serial transfer timing between M37702 and M66010FP.
signal.)
Output “H” level from port P4
Clock synchronous serial I/O mode; Transmission/Reception enable state
Selected internal clock. Transfer clock frequency of 1.5625 MHz.
LSB first
Output “L” level from port P4
Output “L” level from port P4
Transmit/Receive 24-bit data by using UART0.
Output “H” level from port P4
5
4
5
4
. (Expansion I/O ports of M66010FP become floating state by this
.
.
.
7702/7703 Group User’s Manual