General Circuit Interface (GCI)
17-12
Am186™CC/CH/CU Microcontrollers User’s Manual
Figure 17-5
Downstream Versus Upstream
17.5.4.2.2
Bus Reversal Enabled Versus Disabled
When Bus Reversal is
enabled (see Figure 17-6), the Am186CC microcontroller is the clock
slave (GCI_FSC_A and GCI_DCL_A are inputs) and control
master (can communicate with
other downstream devices through the MON1 and C/I1 channels). When Bus Reversal is
disabled (see Figure 17-7), the Am186CC microcontroller is the clock slave (GCI_FSC_A
and GCI_DCL_A are inputs) and control
slave (cannot communicate with other downstream
devices).
D and C/I0 channel arbitration are provided by the TIC bus. (The TIC bus has been split
up into its individual bits for illustration.)
Figure 17-6
GCI With Bus Reversal Enabled
GCI_DU_A
GCI_DD_A
GCI_FSC_A
GCI_DCL_A
Clock Source
GCI_DU_A
GCI_DD_A
GCI
Upstream
Device
(Control Mas-
ter and Clock
Slave)
Am186CC
Transceiver
Am186CC
Codec
Example 1: Am
186CC microcontroller
downstream,
transceiver upstream
Example 2:
GCI codec downstream,
Am
186CC microcontroller
upstream
Controller
Controller
GCI
Downstream
Device
(Control Slave
and Clock
Master)
GCI
Upstream
Device
(Control Mas-
ter and Clock
Master)
GCI
Downstream
Device
(Control Slave
and Clock
Slave)
GCI_FSC_A
GCI_DCL_A
DD
DU
Downstream
#1
Downstream
#2
DD
DD
DU
DU
DD
DU
IC1,IC2,MON1,C/I1
B1,B2,D,MON0,C/I0,E(in),S/G(in),
BAC(out), TBA2–TBA0(out)
Transceiver
Am186CC
Notes:
E, S/G, BAC, and TBA2–TBA0 are bits on the TIC bus.
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...