General Circuit Interface (GCI)
Am186™CC/CH/CU Microcontrollers User’s Manual
17-3
17.3
SYSTEM DESIGN
Table 17-1 lists the HDLC/TSA/GCI signals that are multiplexed with other Am186CC
microcontroller functions. Pinstraps are sampled only at external reset and do not affect
the pin’s other functions, so they are not shown in this table. Other multiplexed signals,
when enabled, either disable or alter any other functions that use the same pin. Table 17-2
on page 17-3 shows an example application.
Figure 17-2
ISDN TA GCI-to-PCM Conversion System Application Example
Table 17-1
HDLC/TSA/GCI Multiplexed Signals (Same as Table 15-1)
Multiplexed Signals
Function
Default
Signal
Ch
External Interface
PIOs
DCE
PCM
GCI
UART
A
DCE_RXD_A
PCM_RXD_A
GCI_DD_A
—
—
DCE and PCM data input/
GCI downstream pin
DCE_RXD_A
DCE_TXD_A
PCM_TXD_A
GCI_DU_A
—
—
DCE and PCM data output/
GCI upstream pin
DCE_TXD_A
DCE_RCLK_A
PCM_CLK_A
GCI_DCL_A
—
—
DCE receive clock/PCM
receive and transmit clock/GCI
receive and transmit clock
DCE_RCLK_A
DCE_TCLK_A
PCM_FSC_A
GCI_FSC_A
—
—
DCE transmit clock/PCM frame
sync clock/GCI frame sync
clock
DCE_TCLK_A
DCE_CTS_A
PCM_TSC_A
—
—
PIO17
DCE clear to send/PCM
external buffer enable
PIO17
DCE_RTR_A
—
—
—
PIO18 DCE ready to receive
PIO18
ISDN GCI Transceiver
PCM Codec
GCI_DU_A
GCI_DD_A
GCI_FSC_A
GCI_DCL_A
SBIN
SBOUT
SFS
SCLK
DXA
DRA
FS
PCLK
PCM_FSC_C
PCM_CLK_C
Am186CC Controller
CC
Summary of Contents for Am186 CC
Page 1: ...Am186 CC CH CU Microcontrollers User s Manual Order 21914B...
Page 4: ...iv Am186 CC CH CU Microcontrollers User s Manual...
Page 18: ...Table of Contents xviii Am186 CC CH CU Microcontrollers User s Manual...
Page 24: ...Introduction xxiv Am186 CC CH CU Microcontrollers User s Manual...
Page 40: ...Architectural Overview 1 16 Am186 CC CH CU Microcontrollers User s Manual...
Page 86: ...System Overview 3 36 Am186 CC CH CU Microcontrollers User s Manual...
Page 92: ...Emulator Support 4 6 Am186 CC CH CU Microcontrollers User s Manual...
Page 112: ...DRAM Controller 6 8 Am186 CC CH CU Microcontrollers User s Manual...
Page 134: ...Interrupts 7 22 Am186 CC CH CU Microcontrollers User s Manual...
Page 186: ...Programmable I O Signals 9 8 Am186 CC CH CU Microcontrollers User s Manual...
Page 200: ...Watchdog Timer 11 6 Am186 CC CH CU Microcontrollers User s Manual...
Page 232: ...Asynchronous Serial Ports UARTs 13 24 Am186 CC CH CU Microcontrollers User s Manual...
Page 242: ...Synchronous Serial Port SSI 14 10 Am186 CC CH CU Microcontrollers User s Manual...
Page 264: ...High Level Data Link Control HDLC 15 22 Am186 CC CH CU Microcontrollers User s Manual...
Page 332: ...Universal Serial Bus USB 18 34 Am186 CC CH CU Microcontrollers User s Manual...
Page 348: ...Register Summary A 16 Am186 CC CH CU Microcontrollers User s Manual...
Page 376: ...Index Index 18 Am186 CC CH CU Microcontrollers User s Manual...