CY8C36_10 CYPRESS [Cypress Semiconductor], CY8C36_10 Datasheet - Page 42

• Manufacturer Part Number: CY8C36_10
• Manufacturer: CYPRESS [Cypress Semiconductor]

Figure 7-13. Digital System Interconnect
Interrupt and DMA routing is very flexible in the CY8C36
programmable architecture. In addition to the numerous fixed
function peripherals that can generate interrupt requests, any
data signal in the UDB array routing can also be used to generate
a request. A single peripheral may generate multiple
independent interrupt requests simplifying system and firmware
design.
(Interrupt/DMA Multiplexer).
Figure 7-14. Interrupt and DMA Processing in the IDMUX
Document Number: 001-53413 Rev. *I
Fixed Function DRQs
Counters
Timer
Clocks
Global
Fixed Function IRQs
Figure 7-14
IO Port
CAN
Pins
UDB Array
EMIF
shows the structure of the IDMUX
I2C
Interrupt and DMA Processing in IDMUX
Digital System Routing I/F
Digital System Routing I/F
IRQs
DRQs
UDB ARRAY
Del-Sig
Controller
Interrupt
Detect
Detect
Edge
Edge
SC/CT
Blocks
Controller
DMA
DACs
0
1
0
2
1
2
3
PRELIMINARY
IO Port
DMA termout (IRQs)
Pins
Comparators
Controller
Controller
Interrupt
DMA
Clocks
Global
7.4.1 I/O Port Routing
There are a total of 20 DSI routes to a typical 8-bit I/O port, 16
for data and four for drive strength control.
When an I/O pin is connected to the routing, there are two
primary connections available, an input and an output. In
conjunction with drive strength control, this can implement a
bidirectional I/O pin. A data output signal has the option to be
single synchronized (pipelined) and a data input signal has the
option to be double synchronized. The synchronization clock is
the system clock (see
from pins are synchronized as this is required if the CPU
interacts with the signal or any signal derived from it.
Asynchronous inputs have rare uses. An example of this is a
feed through of combinational PLD logic from input pins to output
pins.
Figure 7-15. I/O Pin Synchronization Routing
Figure 7-16. I/O Pin Output Connectivity
There are four more DSI connections to a given I/O port to
implement dynamic output enable control of pins. This
connectivity gives a range of options, from fully ganged 8-bits
controlled by one signal, to up to four individually controlled pins.
The output enable signal is useful for creating tri-state
bidirectional pins and buses.
DO
DI
PIN 0
DO
PSoC
8 IO Data Output Connections from the
UDB Array Digital System Interface
PIN1
DO
®
3: CY8C36 Family Datasheet
PIN2
DO
Figure 6-1
PIN3
DO
Port i
PIN4
on page 22). Normally all inputs
DO
PIN5
DO
PIN6
DO
Page 42 of 112
PIN7
DO
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