sc16c852 NXP Semiconductors, sc16c852 Datasheet - Page 50

• Manufacturer Part Number: sc16c852
• Description: 2.5 V To 3.3 V Dual Uart, 5 Mbit/s Max. With 128-byte Fifos, Infrared Irda And 16 Mode Or 68 Mode Bus Interface
• Manufacturer: NXP Semiconductors

NXP Semiconductors
SC16C852_1
Product data sheet
Fig 22. Transmit timing in 16 mode
Fig 23. Transmit timing in 68 mode
(1) INT is active when TX FIFO is empty or TX FIFO drops below trigger level.
(2) INT is cleared when ISR is read or TX FIFO fills up to trigger level.
(1) IRQ is active when TX FIFO is empty or TX FIFO drops below trigger level.
(2) IRQ is cleared when ISR is read or TX FIFO fills up to trigger level.
TXA, TXB
CS (write)
TXA, TXB
IRQ
INT
(1)(2)
(1)(2)
IOW
t
d(CS-TX)W
active
active
start
t
start
d(start-IRQL)
bit
bit
t
d(IOW-TX)
t
d(start-INT)
D0
D0
Rev. 01 — 31 August 2009
D1
D1
5 data bits
6 data bits
7 data bits
5 data bits
6 data bits
7 data bits
Dual UART with 128-byte FIFOs and IrDA encoder/decoder
D2
D2
transmitter ready
16 baud rate clock
data bits (0 to 7)
data bits (0 to 7)
16 baud rate clock
active
D3
D3
D4
D4
D5
D5
TX ready
active
D6
D6
D7
D7
parity
parity
bit
bit
t
d(CS-IRQH)W
stop
stop
bit
bit
t
d(IOW-INTL)
SC16C852
next data
next data
start
start
© NXP B.V. 2009. All rights reserved.
bit
active
bit
active
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