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348
ERTEC 200P-2 Manual
Technical data subject to change
Version 1.0
3
RFF
0h r
Receive FIFO full
4
BSY
0h r
SSP busy flag
Register:
SSPCPSR
Address:
10h
Bits:
7dt0
Reset value:
00h
Attributes:
r
w
Description:
Clock prescale divisor
Register:
SSPIIR_SSPICR
Address:
14h
Bits:
2dt0
Reset value:
0h
Attributes:
rh
Description:
The interrupt status is read from the SSP interrupt identification register
(SSPIIR)
Bit Identifier
Reset Attr.
Function / Description
0
RIS
0h rh
Read: SSP transmit FIFO service request interrupt
status
1
TIS
0h rh
Read: SSP Receive FIFO service request interrupt
status
2
RORIS
0h rh
Read: SSP Receive FIFO overrun interrupt status
2.3.10.8
GPIO (General Purpose Input / Output)
There are a maximum of 96 general purpose input/outputs (GPIOs). They are divided into
2 blocks:
GPIO31-0: 32-bit (available as default GPIO port)
GPIO95-32: 64-bit (available as an alternative to XHIF)
GPIO31-0
is available as a default block and is multiplexed with the interface signals from
the PNPLL, UART2/3, SPI1/2, I
2
C_1_3, timer 0 – 5 and ARM926 watchdog . Following a
reset, this GPIO block is selected and connected to all inputs. The alternate functions are
set by the SW using the GPIO registers (see 2.3.10.8.5).
The internal MII debug interface (internal PHYs) is also multiplexed to GPIO31-0. This
function is set upon an XRESET PowerOn reset with the configuration pins CONFIG(6-3)
(see 2.3.10.9.3) or by the SW in the SCRB register 'Config-REG(6-3)' (see 2.3.10.9.22).
Rules for the SW: The default values of the alternate functions must not be changed if
the internal MII debug interfaces are selected at the corresponding pins with the configu-
ration pins.
The GPIO15-0 inputs are also connected to an I-filter (see 2.3.10.1) and to the ARM
interrupt controller (IRQ32-47, see 2.3.2.14). The polarity of these signals to the ARM
interrupt controller can be set in the GPIO_INT_POLSEL register (see 2.3.10.9.22). In
line with the polarity of the external signals, this ensures a high-active interrupt level.
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