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Serial Interfaces
Description
MN102H75K/F75K/85K/F85K LSI User Manual Panasonic Semiconductor Development Company
127
Panasonic
5 Serial Interfaces
5.1 Description
The MN102H75K/85K contains two general-purpose serial interfaces with syn-
chronous serial, UART, and I
2
C modes. The maximum baud rate in synchronous
serial mode is 12 Mbps. In UART mode, the maximum baud rate is 375,000 bps,
when B
OSC
= 24 MHz.
5.2 Features
Figure 5-1 Serial Interface Configuration Example
SBO0
SBT0
SBI0
SBO1
SBT1
SBI1
TM0IR TM1IR
Signal from 8-bit timers
TXC
TXD
RXC
RXD
Transmitter
Receiver
TXC
TXD
RXC
RXD
Transmitter
Receiver
Tx end interrupt
Rx end interrupt
Tx end interrupt
Rx end interrupt
Table 5-1 Serial Interface Functions and Features
Function/Feature Synchronous Serial Mode UART Mode I
2
C Mode
Parity None, 0, 1, even, or odd Can be master trans-
mitter or receiver. (No
collision detection for
start sequence.)
Character length 7-bit or 8-bit
Transfer bit order LSB or MSB first (programmable; 8-
bit only)
LSB first
Clock source • 1/2 of timer 0 underflow
• 1/8 of timer 0 or 1 underflow
• External clock
• 1/8 of timer 0 or 1 underflow
Maximum baud rate 12 Mbps
(when B
OSC
= 24 MHz)
375,000 bps
(when B
OSC
= 24 MHz)
Error detection • Parity error
• Overrun error
• Parity error
• Overrun error
• Framing error
Buffers Independent transmit/receive buffers (single transmit buffer, double receive
buffers)
Interrupts Transmission or reception complete interrupts