Page 119
TMP89FM42
RA005
8.4
Serial Interface Selecting Function
On the
TMP89FM42
, the built-in serial interface (SIO, UART and I
2
C) communication pins and interrupt source
assignment can be changed. Two out of three functions, SIO0, UART0 and I
2
C0, can be used at the same time by
using this selecting function.
The input pins of the 16-bit timer counter A0 input (TCA0 input) can be changed by using this selecting function.
Figure 8-11 Serial Interface Selecting Function
Note 1: The operation for changing SERSEL must be executed while the applicable serial interface and timer counter operations
are stopped. If SERSEL is switched during operation of these peripheral functions, each peripheral function may receive
(transmit) unexpected data and operate improperly.
Serial interface selection control register
SERSEL
(0x0FCB)
7
6
5
4
3
2
1
0
Bit Symbol
TCA0SEL
SRSEL2
SRSEL0
Read/Write
R/W
R/W
R
R/W
R
R
R/W
R/W
After reset
0
0
0
0
0
0
0
0
TCA0SEL
16-bit timer counter A0 input switch-
ing
00:
01:
10:
11:
P72 input (TCA0)
P21 input (also used as RXD0)
P91 input (also used as RXD1)
Reserved
SRSEL2
Select UART0/SIO0 input/output
port
0:
1:
Select P20, P21, P22
Select PB4, PB5, PB6
SRSEL0
Serial interface selection 0
00:
01:
10:
11:
Select UART0, I2C0
Select UART0, SIO0
Select SIO0, I2C0
Reserved
UART1
P90 (TXD1)
P91 (RXD1)
UART0
SIO0
I2C0
TCA0
P20 (TXD0 / SO0)
P21 (RXD0 / SI0)
P22 (SCLK0)
SERSEL<SRSEL0>
SERSEL<TCA0SEL>
0*
10
Selector
Selector
S
P23 (SDA0 / SO0)
P24 (SCL0 / SI0)
P25 (SCLK0)
P72 (TCA0)
P21 (RXD0)
P91 (RXD1)
01
*0
Selector
S
00
01
10
Selector
S
Port
Port
Port
PB4 (TXD0 / SO0)
PB5 (RXD0 / SI0)
PB6 (SCLK0)
SERSEL
<SRSEL2>
S
1
0
Port
Port
Содержание TLCS-870/C1 Series
Страница 1: ...8 Bit Microcontroller TLCS 870 C1 Series TMP89FM42 查询TMP89FM42供应商 捷多邦 专业PCB打样工厂 24小时加急出货 ...
Страница 3: ...Revision History Date Revision 2007 10 25 1 First Release 2007 11 3 2 Contents Revised ...
Страница 4: ......
Страница 14: ......
Страница 18: ...1 3 Block Diagram TMP89FM42 1 3 Block Diagram Figure 1 2 Block Diagram ...
Страница 22: ...1 4 Pin Names and Functions TMP89FM42 ...
Страница 60: ...2 CPU Core 2 5 Revision History TMP89FM42 ...
Страница 76: ...3 Interrupt Control Circuit 3 8 Revision History TMP89FM42 ...
Страница 86: ...4 External Interrupt control circuit 4 3 Function TMP89FM42 ...
Страница 102: ...7 Voltage Detection Circuit 7 5 Revision History TMP89FM42 ...
Страница 126: ...8 I O Ports 8 3 I O Port Registers TMP89FM42 Note 2 i 0 to 1 ...
Страница 136: ...8 I O Ports 8 5 Revision History TMP89FM42 ...
Страница 142: ...9 Special Function Registers 9 3 SFR3 0x0E40 to 0x0EFF TMP89FM42 ...
Страница 146: ...10 Low Power Consumption Function for Peripherals TMP89FM42 ...
Страница 149: ...TMP89FM42 11 3 Revision History Rev Description RA001 Deleted SLEEP2 description ...
Страница 150: ...11 Divider Output DVO 11 3 Revision History TMP89FM42 ...
Страница 220: ...15 Real Time Clock RTC 15 4 Real Time Clock Operation TMP89FM42 ...
Страница 250: ...16 Asynchronous Serial Interface UART 16 15 Revision History TMP89FM42 ...
Страница 302: ...18 Serial Bus Interface SBI 18 7 Revision History TMP89FM42 ...
Страница 336: ...21 Flash Memory 21 4 Toggle Bit D6 TMP89FM42 Note 1 Make sure that you set the C register to 0x00 LD FLSCR2 0xD5 ...
Страница 338: ...21 Flash Memory 21 4 Toggle Bit D6 TMP89FM42 ...
Страница 384: ...22 Serial PROM Mode 22 15 Revision History TMP89FM42 ...
Страница 388: ...24 Input Output Circuit 24 1 Control Pins TMP89FM42 ...
Страница 404: ...25 Electrical Characteristics 25 11 Revision History TMP89FM42 ...
Страница 406: ...26 Package Dimensions TMP89FM42 ...
Страница 408: ......