MC68340AG25E Freescale Semiconductor, MC68340AG25E Datasheet - Page 307

• Manufacturer Part Number: MC68340AG25E
• Description: IC MPU 32BIT 25MHZ 144-LQFP
• Manufacturer: Freescale Semiconductor

Specifications of MC68340AG25E

• Processor Type: M683xx 32-Bit
• Speed: 25MHz
• Voltage: 5V
• Mounting Type: Surface Mount
• Package / Case: 144-LQFP
• Controller Family/series: 68K
• Core Size: 32 Bit
• No. Of I/o's: 16
• Cpu Speed: 25MHz
• No. Of Timers: 2
• Embedded Interface Type: UART
• Digital Ic Case Style: LQFP
• Rohs Compliant: Yes
• Processor Series: M683xx
• Core: CPU32
• Maximum Clock Frequency: 25 MHz
• Maximum Operating Temperature: + 105 C
• Mounting Style: SMD/SMT
• Minimum Operating Temperature: 0 C
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Features: -
• Lead Free Status / Rohs Status: Details

The receiver detects the beginning of a break in the middle of a character if the break
persists through the next character time. When the break begins in the middle of a
character, the receiver places the damaged character in the receiver first-in-first-out
(FIFO) stack and sets the corresponding error conditions and RxRDY bit in the SR. Then,
if the break persists until the next character time, the receiver places an all-zero character
into the receiver FIFO and sets the corresponding RB and RxRDY bits in the SR.
7.3.2.3 FIFO STACK. The FIFO stack is used in each channel's receiver buffer logic. The
stack consists of three receiver holding registers. The receive buffer consists of the FIFO
and a receiver shift register connected to the RxDx (refer to Figure 7-4). Data is
7-12
RECEIVER
OVERRUN
NOTES:
ENABLED
RxRDYA
1. Timing shown for MR1(7) = 1
2. Timing shown for OPCR(4) = 1 and MR1(6) = 0
3. R = Read
4. C = Received Character
RxRDY
FFULL
(SR1)
(SR0)
(SR4)
RTS
OPR(0) = 1
RxD
CS
N
1
C1
STATUS DATA
R
C1
Freescale Semiconductor, Inc.
Figure 7-6. Receiver Timing Diagram
R
For More Information On This Product,
C2
MC68340 USER’S MANUAL
Go to: www.freescale.com
C3
C4
C5
LOST
C5
STATUS DATA
C2
R
C6, C7, C8 ARE LOST
R
C6
R R
RESET BY COMMAND
C3
R R
C7
STATUS DATA
MOTOROLA
C4
C8