Datasheet

417
32133D–11/2011
UC3D
22.3 Block Diagram
Figure 22-1. IISC Block Diagram
22.4 I/O Lines Description
22.5 Product Dependencies
In order to use this module, other parts of the system must be configured correctly, as described
below.
22.5.1 I/O lines
The IISC pins may be multiplexed with I/O Controller lines. The user must first program the I/O
Controller to assign the desired IISC pins to their peripheral function. If the IISC I/O lines are not
used by the application, they can be used for other purposes by the I/O Controller. It is required
to enable only the IISC inputs and outputs actually in use.
22.5.2 Power Management
If the CPU enters a sleep mode that disables clocks used by the IISC, the IISC will stop function-
ing and resume operation after the system wakes up from sleep mode.
I/O Controller
ISCK
IWS
ISDI
ISDO
IMCK
Receiver
Clocks
Transmitter
Peripheral Bus interface
Generic clock
PB
Peripheral
Bus Bridge
Interrupt
Controller
SCIF
Power
Manager
PB clock
IRQ
Peripheral
DMA
Controller
Rx
Tx
IISC
Table 22-1. I/O Lines Description
Pin Name Pin Description Type
IMCK Master Clock Output
ISCK Serial Clock Input/Output
IWS I
2
S Word Select Input/Output
ISDI Serial Data Input Input
ISDO Serial Data Output Output