MC13191_08 Datasheet, PDF (13/24 Pages) Freescale Semiconductor, Inc – 2.4 GHz ISM Band Low Power Transceiver

Table 8. Pin Function Description (continued)
Pin # Pin Name
Type
Description
Functionality
8 GPIO4¹
9 GPIO3¹
10 GPIO2¹
11 GPIO1¹
Digital Input/ Output General Purpose Input/Output 4.
See Footnote 1
Digital Input/ Output General Purpose Input/Output 3.
See Footnote 1
Digital Input/ Output General Purpose Input/Output 2. When gpio_alt_en, Register See Footnote 1
9, Bit 7 = 1, GPIO2 functions as a “CRC Valid” indicator.
Digital Input/ Output General Purpose Input/Output 1. When gpio_alt_en, Register See Footnote 1
9, Bit 7 = 1, GPIO1 functions as an “Out of Idle” indicator.
12 RST
Digital Input
13 RXTXEN² Digital Input
14 ATTN²
Digital Input
Active Low Reset. While held low, the IC is in Off Mode and all
internal information is lost from RAM and SPI registers. When
high, IC goes to IDLE Mode, with SPI in default state.
Active High. Low to high transition initiates RX or TX sequence
depending on SPI setting. Should be taken high after SPI
programming to start RX or TX sequence and should be held
high through the sequence. After sequence is complete, return
RXTXEN to low. When held low, forces Idle Mode.
See Footnote 2
Active Low Attention. Transitions IC from either Hibernate or See Footnote 2
Doze Modes to Idle.
15 CLKO
16 SPICLK²
17 MOSI²
18 MISO³
19 CE²
Digital Output
Digital Clock Input
Digital Input
Digital Output
Digital Input
Clock output to host MCU. Programmable frequencies of:
16 MHz, 8 MHz, 4 MHz, 2 MHz, 1 MHz, 62.5 kHz, 32.786+ kHz
(default), and 16.393+ kHz.
External clock input for the SPI interface.
See Footnote 2
Master Out/Slave In. Dedicated SPI data input.
See Footnote 2
Master In/Slave Out. Dedicated SPI data output.
See Footnote 3
Active Low Chip Enable. Enables SPI transfers.
See Footnote 2
20 IRQ
Digital Output
Active Low Interrupt Request.
Open drain device.
Programmable 40 kΩ
internal pull-up.
Interrupt can be
serviced every 6 µs
with <20 pF load.
Optional external
pull-up must be >4 kΩ.
21 VDDD
Power Output
Digital regulated supply bypass.
Decouple to ground.
22 VDDINT
23 GPIO5¹
24 GPIO6¹
25 GPIO7¹
Power Input
Digital interface supply & digital regulator input. Connect to
Battery.
Digital Input/Output General Purpose Input/Output 5.
Digital Input/Output General Purpose Input/Output 6.
Digital Input/Output General Purpose Input/Output 7.
2.0 to 3.4 V. Decouple
to ground.
See Footnote 1
See Footnote 1
See Footnote 1
26 XTAL1 Input
Crystal Reference oscillator input.
Connect to 16 MHz
crystal and load
capacitor.
MC13191 Technical Data, Rev. 1.6
Freescale Semiconductor
13