SC28L201 datasheet(9/110 Pages) NXP

9 / 110 page

9397 750 13138

Product data sheet

Rev. 01 — 31 October 2005

9 of 110

Philips Semiconductors

SC28L201

3.3 V, 5 V UART, 3.125 Mbit/s, with 256-byte FIFO

Functional description

Refer to the block diagrams shown in Figure 1 and Figure 2.

The SC28L201 is composed of several functional blocks. They are listed in the

approximate order of hierarchy as seen from the pins of the device.

• Bus interface. Motorola or Intel format

• Timing circuits

• I/O ports

• UART

• Transmitter and receiver

• Transmitter real time error test

• FIFO structures

• Arbitrating interrupt structure

• Character and address recognition

• Flow control

• Test and software compatibility with previous Philips UARTs

6.1 Brief description of functional blocks

6.1.1 Bus interface: the two basic modes of bus interface

The bus interface operates in ‘68000’ or ‘86xxx’ format as selected by the MODE_IM pin.

The signals used by this section are the Address, Data bus, Chip select, read/write, Data

acknowledge and Interrupt acknowledge and Interrupt request. Assertion of DACKN

requires two edges of the SCLK after the assertion of CEN. The default mode is the

86xxx mode. Pin or register programming may change it to the 68000 mode.

I/O6B

I/O

Additional general-purpose I/O pins. They are similar to the above without any

connection to the data path or clocks. They have Change-Of-State (COS) detectors

and will generate interrupts if enabled.

I/O4B to I/O2B

30, 31, 32

I/O0B

VDD

1, 13, 24,

power

Power supply (4 pins). +3.3 V

± 10 % or +5.0 V ± 10 % supply input. Operation is

assured from 2.97 V or 5.5 V. Timing parameters are speciﬁed with respect to the

VDD being at 3.3 V ± 10 % or 5.0 V ± 10 %.

VSS

2, 14, 25,

35, 36

power

Ground (5 pins)

Table 3:

Pin description for 68000 bus interface (Motorola) …continued

See Figure 4.

Symbol

Type

Description

SC28L201 датащи(PDF) 9 Page - NXP Semiconductors

SC28L201 датащи(HTML) 9 Page - NXP Semiconductors

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 ...More

датащи скачать

ссылки URL