Infineon Technologies TC1784, Руководство пользователя

Страница: 584 / 2350

TC1784
General Purpose I/O Ports and Peripheral I/O Lines (Ports)
User´s Manual 9-8 V1.1, 2011-05
Ports, V1.1
9.2.1 Port Input/Output Control Registers
The port input/output control registers select the digital output and input driver
functionality and characteristics of a GPIO port pin. Port direction (input or output), pull-
up or pull-down devices for inputs, and push-pull or open-drain functionality for outputs
can be selected by the corresponding bit fields PCx (x = 0-15). Each 32-bit wide port
input/output control register controls four GPIO port lines:
Register Pn_IOCR0 controls the Pn.[3:0] port lines
Register Pn_IOCR4 controls the Pn.[7:4] port lines
Register Pn_IOCR8 controls the Pn.[11:8] port lines
Register Pn_IOCR12 controls the Pn.[15:12] port lines
The diagrams below show the register layouts of the port input/output control registers
with the PCx bit fields. One PCx bit field controls exactly one port line Pn.x.
Pn_IOCR0 (n=0-10)
Port n Input/Output Control Register 0
(F000 0C10
H
+n*100
H
) Reset Value: 2020 2020
H
31 28 27 24 23 20 19 16 15 12 11 8 7 4 3 0
PC3 0 PC2 0 PC1 0 PC0 0
rw r rw r rw r rw r
Field Bits Type Description
PC0,
PC1,
PC2,
PC3 [7:4],
[15:12],
[23:20],
[31:28] rw Port Control for Port n Pin x
This bit field defines the Port n line x functionality
according to the coding table (see
Table 9-6 ).
0 [3:0],
[11:8],
[19:16],
[27:24] r Reserved
Read as 0; should be written with 0.