NRF9E5 Datasheet, PDF (16/104 Pages) List of Unclassifed Manufacturers – 433/868/915MHz RF Transceiver with Embedded 8051 Compatible Microcontroller and 4 Input, 10 Bit ADC

PRODUCT SPECIFICATION
nRF9 E5 Single Chip Transceiver with Embedded Microcontroller and ADC
Port 1 is controlled by SFR-registers 0x90, 0x96 and 0x97, and only the 4 lower bits of
the registers are used.
Addr
SFR
(hex)
90
96
97
R/W
R/W
R/W
R/W
#bit Init Name Function
value
(hex)
4
F P1
Port 1, pins SPI_SCK, SPI_MOSI, SPI_MISO and
SPI_CSN
4
4 P1_DIR Direction for each bit of Port 1
0: Output, 1: Input
Direction is overridden if alternate function is selected
for a pin, or if SPI_CTRL=01.
SPI_MISO is always input.
4
0 P1_ALT Select alternate functions for each pin of P1
if corresponding bit in P1_ALT is set, as listed in Table
11 Port 1 (P1) functions
Table 12 Port 1 control and data SFR-registers.
P1 is by default configured as a SPI master port. In this case, it is then controlled by the
3 SFR registers 0xB2, 0xB3 and 0xB4 as shown in Table 33 on page 43.
Main office: Nordic Semiconductor ASA - Vestre Rosten 81, N-7075 Tiller, Norway -Phone [phone] - Fax [phone]
Revision: 1.1
Page 16 of 104
June 2004