CP3BT26G18NEPX/NOPB National Semiconductor, CP3BT26G18NEPX/NOPB Datasheet - Page 72

• Manufacturer Part Number: CP3BT26G18NEPX/NOPB
• Manufacturer: National Semiconductor

Specifications of CP3BT26G18NEPX/NOPB

• Operating Temperature (min): -40C
• Operating Temperature (max): 85C
• Operating Temperature Classification: Industrial
• Mounting: Surface Mount
• Pin Count: 128
• Package Type: LQFP
• Lead Free Status / RoHS Status: Compliant

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14.1.6
The PxHDRV register is a byte-wide, read/write register that
controls the slew rate of the corresponding pins. The high
drive strength function is enabled when the corresponding
bits of the PxHDRV register are set. In both GPIO and alter-
nate function modes, the drive strength function is enabled
by the PxHDRV registers. At reset, the PxHDRV registers
are cleared, making the ports low speed.
PxHDRV
14.1.7
The PxALTS register selects which of two alternate func-
tions are selected for the port pin. These bits are ignored
unless the corresponding PxALT bits are set. Each port pin
can be controlled independently.
PxALTS
7
7
Port High Drive Strength Register (PxHDRV)
Port Alternate Function Select Register
(PxALTS)
Port Pin
PE0
PE1
PE2
PE3
PE4
PE5
PF0
PF1
PF2
PF3
PF4
PF5
PF6
Table 30 Alternate Function Select
The PxHDRV bits control whether output pins
are driven with slow or fast slew rate.
0
1
The PxALTS bits select among two alternate
functions. Table 30 shows the mapping of the
PxALTS bits to the alternate functions. Un-
used PxALTS bits must be clear.
–
–
Slow slew rate.
Fast slew rate.
PxHDRV
PxALTS
UART0 RXD0
UART0 TXD0
UART0 CTS
UART0 CKX
PxALTS = 0
UART0 RTS
MDIDO
MDODI
MWCS
SRFS
MSK
SCK
STD
SFS
PxALTS = 1
Reserved
Reserved
Reserved
Reserved
TIO1
TIO2
TIO3
TIO4
TIO5
TIO6
TIO7
NMI
TB
0
0
72
Port Pin
PG0
PG1
PG2
PG3
PG4
PG5
PG6
PG7
PH0
PH1
PH2
PH3
PH4
PH5
PH6
PH7
PF7
PJ0
PJ1
PJ2
PJ3
PJ4
PJ5
PJ6
PJ7
Table 30 Alternate Function Select
UART1 RXD1
UART2 RXD2
UART3 RXD3
UART1 TXD1
UART2 TXD2
UART3 TXD3
PxALTS = 0
RFSYNC
BTSEQ1
CANRX
ASYNC
CANTX
WUI10
WUI18
WUI19
WUI20
WUI21
WUI22
WUI23
WUI24
RFCE
SCLK
SDAT
SRD
SLE
TA
PxALTS = 1
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
BTSEQ2
BTSEQ3
SRCLK
WUI11
WUI12
WUI13
WUI14
WUI15
WUI16
WUI17
WUI9
TIO8