Cypress CY7C67300 Manual De Usuario
CY7C67300
Document #: 38-08015 Rev. *J
Page 73 of 99
Register Description
The SPI Receive Count register designates the block byte length
for the SPI receive DMA transfer.
for the SPI receive DMA transfer.
Count
(Bits [10:0])
The Count field sets the count for the SPI receive DMA transfer.
Reserved
Write all reserved bits with ’0’.
UART Registers
There are three registers dedicated to UART operation. Each of
these registers is covered in this section and summarized in
these registers is covered in this section and summarized in
.
UART Control Register [0xC0E0] [R/W]
Register Description
The UART Control register enables or disables the UART,
allowing GPIO28 (UART_TXD) and GPIO27 (UART_RXD) to be
freed up for general use. This register must also be written to set
the baud rate, which is based on a 48 MHz clock.
allowing GPIO28 (UART_TXD) and GPIO27 (UART_RXD) to be
freed up for general use. This register must also be written to set
the baud rate, which is based on a 48 MHz clock.
Scale Select
(Bit 4)
The Scale Select bit acts as a prescaler that divide the baud rate
by eight.
by eight.
1:
Enable prescaler
0:
Disable prescaler
Baud Select
(Bits [3:1])
for a definition of this field.
UART Enable
(Bit 0)
The UART Enable bit enables or disables the UART.
1:
Enable UART
0:
Disable UART. This allows GPIO28 and GPIO27 to be used
for general use.
Reserved
Write all reserved bits with ’0’.
Table 119. UART Registers
Register Name
Address
R/W
UART Control Register
0xC0E0
R/W
UART Status Register
0xC0E2
R
UART Data Register
0xC0E4
R/W
Table 120. UART Control Register
Bit #
15
14
13
12
11
10
9
8
Field
Reserved...
Read/Write
-
-
-
-
-
-
-
-
Default
0
0
0
0
0
0
0
0
Bit #
7
6
5
4
3
2
1
0
Field
...Reserved
Scale Select
Baud Select
UART Enable
Read/Write
-
-
-
R/W
R/W
R/W
R/W
R/W
Default
0
0
0
0
0
1
1
1
Table 121. UART Baud Select Definition
Baud Select
[3:1]
Baud Rate w/ DIV8 = 0 Baud Rate w/ DIV8 = 1
000
115.2 KBaud
14.4 KBaud
001
57.6 KBaud
7.2 KBaud
010
38.4 KBaud
4.8 KBaud
011
28.8 KBaud
3.6 KBaud
100
19.2 KBaud
2.4 KBaud
101
14.4 KBaud
1.8 KBaud
110
9.6 KBaud
1.2 KBaud
111
7.2 KBaud
0.9 KBaud