MOD5234-100IR NetBurner Inc, MOD5234-100IR Datasheet - Page 544

• Manufacturer Part Number: MOD5234-100IR
• Description: MOD5234 10/100 ETHERNET MODULE
• Manufacturer: NetBurner Inc
• Type: Controllers & Processorsr

Specifications of MOD5234-100IR

• Interface: I²C, SPI, UART
• Voltage - Supply: 2.5V
• Mounting Type: Surface Mount
• Package / Case: Module
• Product: Modules
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Data Format: -
• Baud Rates: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant
• Other names: Q4483564

UART Modules
26.3.6
The receive buffers (shown in
holding registers, which act as a FIFO. UnRXD is connected to the serial shift register. The CPU
reads from the top of the FIFO while the receiver shifts and updates from the bottom when the shift
register is full (see
26.3.7
The transmit buffers consist of the transmitter holding register and the transmitter shift register.
The holding register accepts characters from the bus master if channel’s USRn[TxRDY] is set. A
write to the transmit buffer clears USRn[TxRDY], inhibiting any more characters until the shift
register can accept more data. When the shift register is empty, it checks if the holding register has
a valid character to be sent (TxRDY = 0). If there is a valid character, the shift register loads it and
sets USRn[TxRDY] again. Writes to the transmit buffer when the channel’s TxRDY = 0 and when
the transmitter is disabled have no effect on the transmit buffer.
Figure 26-9
26-12
Bits
1–0
Value
00
01
10
11
shows UTBn. TB contains the character in the transmit buffer.
UART Receive Buffers (URBn)
UART Transmit Buffers (UTBn)
NO ACTION TAKEN
RECEIVER ENABLE
RECEIVER DISABLE
Address
Command
Figure
Reset
Table 26-7. UCRn Field Descriptions (Continued)
—
W
R
Figure 26-8. UART Receive Buffer (URBn)
26-18). RB contains the character in the receiver.
1
7
IPSBAR + 0x020C (URB0); IPSBAR + 0x024C (URB1);
Causes the receiver to stay in its current mode. If the receiver is enabled, it
remains enabled; if disabled, it remains disabled.
If the UART module is not in multidrop mode (UMR1n[PM] ≠ 11),
enables the channel's receiver and forces it into search-for-start-bit state. If the
receiver is already enabled, this command has no effect.
Disables the receiver immediately. Any character being received is lost. The
command does not affect receiver status bits or other control registers. If the
UART module is programmed for local loop-back or multidrop mode, the receiver
operates even though this command is selected. If the receiver is already
disabled, the command has no effect.
Reserved, do not use.
Figure
MCF5235 Reference Manual, Rev. 2
1
6
RC (This field selects a single command)
26-8) contain one serial shift register and three receiver
1
5
IPSBAR + 0x028C (URB2)
1
4
RB
1
3
Description
2
1
1
1
1
0
Freescale Semiconductor
RECEIVER ENABLE