Serial Communications Overview
Am186™CC/CH/CU Microcontrollers User’s Manual
12-3
12.2.2
Sample Applications for the Am186CC Communications Controller
Figure 12-1 on page 12-4 shows an HDLC control application that uses all four HDLC
channels of the Am186CC microcontroller configured as nonmultiplexed raw DCE external
interfaces, in addition to the High-Speed UART port for debugging.
Figure 12-2 on page 12-4 shows a POTS linecard application that uses all four HDLC
channels of the Am186CC microcontroller multiplexed to external interface A for linecard
control. In addition, this application uses the UART interfaced to external interface D for
debugging, and the SSI port to control the linecard voice integrated circuits. Unused external
interfaces B and C are used as PIOs.
Figure 12-3 on page 12-5 shows an ISDN application for the Am186CC microcontroller that
uses three HDLC channels multiplexed off external interface A, the High-Speed UART port
for a serial AT modem connection to the host PC (or a USB connection to the PC can be
used instead), the UART port on external interface D for debugging, and the SSI port to
control the POTS interface integrated circuits. (Flow control on the High-Speed UART is
also multiplexed to external interface D.)
Figure 12-4 on page 12-5 shows an ISDN application that uses the GCI-to-PCM Highway
conversion feature of the Am186CC microcontroller. This application uses three HDLC
channels multiplexed off external interface A, the High-Speed UART port for a serial AT
modem connection to the host PC, and the debug UART port on external interface D (flow
control on the High-Speed UART is also multiplexed to external interface D). External
interface C is used for the converted GCI-to-PCM highway frame sync and clock required
by PCM Highway codecs. External interface B is unused.
PCM
Channel
D
PCM_RXD_D
158
DCE
Channel
D
DCE_RXD_D
Low-
Speed
UART
RXD_U
High-
Speed
UART
—
PIO
PIO26
PCM_TXD_D
159
DCE_TXD_D
TXD_U
—
PIO20
PCM_CLK_D
156
DCE_RCLK_D
RTR_U
—
PIO25
PCM_FSC_D
157
DCE_TCLK_D
CTS_U
—
PIO24
PCM_TSC_D
24
DCE_CTS_D
—
CTS_HU
PIO46
Low-
Speed
UART
RXD_U
158
DCE
Channel
D
DCE_RXD_D
PCM
Channel
D
PCM_RXD_D
—
—
PIO
PIO26
TXD_U
159
DCE_TXD_D
PCM_TXD_D
—
—
PIO20
RTR_U
156
DCE_RCLK_D
PCM_CLK_D
—
—
PIO25
CTS_U
157
DCE_TCLK_D
PCM_FSC_D
—
—
PIO24
High-
Speed
UART
RXD_HU
25
DCE
Channel
D
—
PCM
Channel
D
—
—
—
PIO
PIO16
TXD_HU
26
—
—
—
—
—
RTR_HU
23
DCE_RTR_D
—
—
—
PIO47
CTS_HU
24
DCE_CTS_D
PCM_TSC_D
—
—
PIO46
GCI
Channel
A
GCI_DD_A
118
DCE
Channel
A
DCE_RXD_A
PCM
Channel
A
PCM_RXD_A
—
—
PIO
—
GCI_DU_A
119
DCE_TXD_A
PCM_TXD_A
—
—
—
GCI_DCL_A
117
DCE_RCLK_A
PCM_CLK_A
—
—
—
GCI_FSC_A
116
DCE_TCLK_A
PCM_FSC_A
—
—
—
GCI to
PCM
Con-
version
PCM_CLK_C
150
DCE
Channel
C
DCE_RCLK_C
PCM
Channel
C
PCM_CLK_C
—
—
PIO
PIO22
PCM_FSC_C
149
DCE_TCLK_C
PCM_FSC_C
—
—
PIO23
Table 12-1
Multiplexed Signal Trade-Offs for Serial Interfaces (Continued)
Function Used
Functions Lost
Inter-
face
Name
Pin
Inter-
face
Name
Inter-
face
Name
Inter-
face
Name
Inter-
face
Name
CC
CC
CC
CC
CC
CC
CC
CC
CH
CC
CH
CC
CC
CC
CC
Содержание Am186 CC
Страница 1: ...Am186 CC CH CU Microcontrollers User s Manual Order 21914B...
Страница 4: ...iv Am186 CC CH CU Microcontrollers User s Manual...
Страница 18: ...Table of Contents xviii Am186 CC CH CU Microcontrollers User s Manual...
Страница 24: ...Introduction xxiv Am186 CC CH CU Microcontrollers User s Manual...
Страница 39: ...Architectural Overview Am186 CC CH CU Microcontrollers User s Manual 1 15 Figure 1 6 32 Channel Linecard CH CC...
Страница 40: ...Architectural Overview 1 16 Am186 CC CH CU Microcontrollers User s Manual...
Страница 86: ...System Overview 3 36 Am186 CC CH CU Microcontrollers User s Manual...
Страница 92: ...Emulator Support 4 6 Am186 CC CH CU Microcontrollers User s Manual...
Страница 112: ...DRAM Controller 6 8 Am186 CC CH CU Microcontrollers User s Manual...
Страница 134: ...Interrupts 7 22 Am186 CC CH CU Microcontrollers User s Manual...
Страница 186: ...Programmable I O Signals 9 8 Am186 CC CH CU Microcontrollers User s Manual...
Страница 200: ...Watchdog Timer 11 6 Am186 CC CH CU Microcontrollers User s Manual...
Страница 232: ...Asynchronous Serial Ports UARTs 13 24 Am186 CC CH CU Microcontrollers User s Manual...
Страница 242: ...Synchronous Serial Port SSI 14 10 Am186 CC CH CU Microcontrollers User s Manual...
Страница 264: ...High Level Data Link Control HDLC 15 22 Am186 CC CH CU Microcontrollers User s Manual...
Страница 332: ...Universal Serial Bus USB 18 34 Am186 CC CH CU Microcontrollers User s Manual...
Страница 348: ...Register Summary A 16 Am186 CC CH CU Microcontrollers User s Manual...
Страница 376: ...Index Index 18 Am186 CC CH CU Microcontrollers User s Manual...