High-Level Data Link Control (HDLC)
Am186™CC/CH/CU Microcontrollers User’s Manual
15-5
15.4
REGISTERS
Table 15-2 lists the 25 unique registers that control a single HDLC channel. The x shown
in the register name can be A, B, C, or D, depending on the channel selected. The table
shows the offset for Channel A; for Channel B, add 40h to the offset shown. Both the
Am186CC and Am186CH microcontrollers support Channels A and B.
The Am186CC microcontroller also supports Channel C and D. Add 80h to the offset shown
for Channel C, and add C0h for Channel D.
In addition to the registers shown in Table 15-2, the System Configuration (SYSCON)
register, offset 03F0h, has two bit fields that configure HDLC: ITF4 (bits 9–8) and EXSYNC
(bit 7).
In the Am186CC microcontroller, the IFT4 bit field configures the interface of HDLC
Channel D. Setting the EXSYNC bit causes the clock and frame information to be driven
out of HDLC Channel C.
In the Am186CH HDLC microcontroller, there is no HDLC Channel D, but the ITF4 bit field
default value is 00b, specifying full HDLC with flow control. Therefore, software must change
the value of the ITF4 bit field to 10b before using the UART interface or High-Speed UART
with flow control.
Appendix A summarizes the bits in all the registers. For a complete description of all the
peripheral registers, see the
Am186™CC/CH/CU Microcontrollers Register Set Manual,
order #21916.
D
DCE_RXD_D
PCM_RXD_D
—
RXD_U
PIO26
DCE and PCM data input/
UART data receive
PIO26
DCE_TXD_D
PCM_TXD_D
—
TXD_U
PIO20
DCE and PCM data output/
UART data transmit
PIO20
DCE_RCLK_D
PCM_CLK_D
—
RTR_U
PIO25
DCE receive clock/PCM
receive and transmit clock
input/UART ready-to-receive
PIO25
DCE_TCLK_D
PCM_FSC_D
—
CTS_U
PIO24
DCE transmit clock/PCM frame
sync clock input/UART clear-
to-send
PIO24
DCE_CTS_D
PCM_TSC_D
—
CTS_HU
PIO46
DCE clear to send/PCM
external buffer enable/High-
Speed UART clear-to-send
PIO46
DCE_RTR_D
—
—
RTR_HU
PIO47
DCE ready to receive/High-
Speed UART ready-to-receive
PIO47
Table 15-1
HDLC/TSA/GCI Multiplexed Signals (Continued)
Multiplexed Signals
Function
Default
Signal
Ch
External Interface
PIOs
DCE
PCM
GCI
UART
CC
CC
CC
CC
CH
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...