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CY7C601xx
CY7C602xx
Document 38-16016 Rev. *C
Page 38 of 62
P1.3 Configuration (SSEL)
P1.4–P1.6 Configuration (SCLK, SMOSI, SMISO)
P1.7 Configuration
Table 57.P1.3 Configuration (P13CR) [0x10] [R/W]
Bit #
7
6
5
4
3
2
1
0
Field
Reserved
Int Enable
Int Act Low
Reserved
High Sink
Open Drain
Pull Up Enable
Output Enable
Read/Write
–
R/W
R/W
–
R/W
R/W
R/W
R/W
Default
0
0
0
0
0
0
0
0
This register controls the operation of the P1.3 pin.
The P1.3 GPIO’s threshold is always set to TTL.
When the SPI hardware is enabled, the output enable and output state of the pin is controlled by the SPI circuitry. When the SPI
hardware is disabled, the pin is controlled by the Output Enable bit and the corresponding bit in the P1 data register.
Regardless of whether the pin is used as an SPI or GPIO pin the Int Enable, Int act Low, High Sink, Open Drain, and Pull Up
Enable control the behavior of the pin.
The 50-mA sink drive capability is only available in the CY7C602xx. In the CY7C601xx, only 8-mA sink drive capability is available
on this pin regardless of the setting of the High Sink bit.
Table 58.P1.4–P1.6 Configuration (P14CR–P16CR) [0x11–0x13] [R/W]
Bit #
7
6
5
4
3
2
1
0
Field
SPI Use
Int Enable
Int Act Low
Reserved
High Sink
Open Drain
Pull Up Enable
Output Enable
Read/Write
R/W
R/W
R/W
–
R/W
R/W
R/W
R/W
Default
0
0
0
0
0
0
0
0
These registers control the operation of pins P1.4–P1.6, respectively.
The P1.4–P1.6 GPIO’s threshold is always set to TTL.
When the SPI hardware is enabled, pins that are configured as SPI Use have their output enable and output state controlled by
the SPI circuitry. When the SPI hardware is disabled or a pin has its SPI Use bit clear, the pin is controlled by the Output Enable
bit and the corresponding bit in the P1 data register.
Regardless of whether any pin is used as an SPI or GPIO pin the Int Enable, Int act Low, High Sink, Open Drain, and Pull-up
Enable control the behavior of the pin.
The 50-mA sink drive capability is only available in the CY7C602xx. In the CY7C601xx, only 8-mA sink drive capability is available
on this pin regardless of the setting of the High Sink bit.
Bit 7:
SPI Use
0 = Disable the SPI alternate function. The pin is used as a GPIO
1 = Enable the SPI function. The SPI circuitry controls the output of the pin
Important Note for Comm Modes 01 or 10 (SPI Master or SPI Slave, see
Table 64
):
When configured for SPI (SPI Use = 1 and Comm Modes [1:0] = SPI Master or SPI Slave mode), the input/output direction of
pins P1.3, P1.5, and P1.6 is set automatically by the SPI logic. However, pin P1.4's input/output direction is NOT automatically
set; it must be explicitly set by firmware. For SPI Master mode, pin P1.4 must be configured as an output; for SPI Slave mode,
pin P1.4 must be configured as an input.
Table 59. P1.7 Configuration (P17CR) [0x14] [R/W]
Bit #
7
6
5
4
3
2
1
0
Field
Reserved
Int Enable
Int Act Low
Reserved
High Sink
Open Drain
Pull Up Enable
Output Enable
Read/Write
–
R/W
R/W
–
R/W
R/W
R/W
R/W
Default
0
0
0
0
0
0
0
0
This register controls the operation of pin P1.7.
The 50-mA sink drive capability is only available in the CY7C602xx. In the CY7C601xx, only 8-mA sink drive capability is available
on this pin regardless of the setting of the High Sink bit.
The P1.7 GPIO’s threshold is always set to TTL.