JN5148-001-X NXP Semiconductors, JN5148-001-X Datasheet - Page 55

• Manufacturer Part Number: JN5148-001-X
• Description: IC MCU 802.15.4 32BIT 2.4G 56QFN
• Manufacturer: NXP Semiconductors
• Series: JN5148r

Specifications of JN5148-001-X

• Frequency: 2.4GHz
• Data Rate - Maximum: 667kbps
• Modulation Or Protocol: 802.15.4
• Applications: Home/Building Automation, Industrial Control
• Power - Output: 2.5dBm
• Sensitivity: -95dBm
• Voltage - Supply: 2 V ~ 3.6 V
• Current - Receiving: 17.5mA
• Current - Transmitting: 15mA
• Data Interface: PCB, Surface Mount
• Memory Size: 128kB RAM, 128kB ROM
• Antenna Connector: PCB, Surface Mount
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 56-QFN
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 616-1049-2; 935293999531; JN5148-001-X

19 Intelligent Peripheral Interface
The Intelligent Peripheral (IP) Interface is provided for systems that are more complex, where there is a processor
that requires a wireless peripheral. As an example, the JN5148 may provide a complete JenNet or ZigBee PRO
wireless network interface to a phone, computer, PDA, set-top box or games console. No resources are required from
the main processor compared to a transceiver as the complete wireless protocol may be run on the internal JN5148
CPU. The wireless peripheral may be controlled via one of the UARTs but the IP interface is intended to provide a
high-speed, low-processor-overhead interface.
The intelligent peripheral interface is a SPI slave interface and uses pins shared with other DIO signals. The
interface is designed to allow message passing and data transfer. Data received and transmitted on the IP interface
is copied directly to and from a dedicated area of memory without intervention from the CPU. This memory area, the
intelligent peripheral memory block, contains 64 32-bit word receive and transmit buffers.
The interface functions as a SPI slave. It is possible to select the clock edge of IP_CLK on which data on the IP_DIN
line of the interface is sampled, and the state of data output IP_DOUT is changed. The order of transmission is MSB
first. The IP_DO data output is tri-stated when the device is inactive, i.e. the device is not selected via IP_SEL. An
interrupt output line IP_INT is available so that the JN5148 can indicate to an external master that it has data to
transfer. The interface can be clocked at up to 8MHz
The IP interface signals IP_CLK, IP_DO, IP_DI, IP_SEL, IP_INT are alternate functions of pins DIO14 to 18
respectively.
19.1 Data Transfer Format
Transfers are started by the remote processor asserting the IP_SEL line and terminated by the remote processor de-
asserting IP_SEL.
Data transfers are bi-directional and traffic in both directions has a format of status byte, data length byte (of the
number of 32-bit words to transfer) and data packet (from the receive and transmit buffers), as shown in Figure 42
The first byte transferred into the JN5148 is a status byte with the format shown in Table 6. This is followed by a
padding byte that should be set to zero. The first byte output by the JN5148 is a padding byte, that should be ignored,
followed by a status byte with the format shown in Table 6
© NXP Laboratories UK 2010
Intelligent
Peripheral
Interface
JN5148
Bit
7:2
1
0
Figure 41: Intelligent Peripheral Connection
RXRDY
RSVD
IP_DI
IP_INT
IP_CLK
Field
IP_DO
IP_SEL
TXQ
Table 6: IP Status Byte Format
JN-DS-JN5148-001 1v6
Reserved, set to 0
1: Data queued for transmission
1: Buffer ready to receive data
SPIMISO
SPIMOSI
SPIINT
SPISEL
SPICLK
Description
MASTER
(e.g. in cellphone, computer)
SPI
System Processor
CPU
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