Lucent Technologies MN102F75K User Manual
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
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