MRF24J40_08 Datasheet, PDF (31/152 Pages) Microchip Technology – IEEE 802.15.4™ 2.4 GHz RF Transceiver

MRF24J40
REGISTER 2-19: SYMTICKL: SYMBOL PERIOD TICK LOW BYTE REGISTER (ADDRESS: 0x14)
R/W-0
TICKP7
bit 7
R/W-1
TICKP6
R/W-0
TICKP5
R/W-0
TICKP4
R/W-0
TICKP3
R/W-0
TICKP2
R/W-0
TICKP1
R/W-0
TICKP0
bit 0
Legend:
R = Readable bit
-n = Value at POR
W = Writable bit
‘1’ = Bit is set
U = Unimplemented bit, read as ‘0’
‘0’ = Bit is cleared
x = Bit is unknown
bit 7-0
TICKP<7:0>: Symbol Period Tick bits
Number of ticks to define a symbol period. Tick period is based on the system clock frequency of
20 MHz. TICKP is a 9-bit value. The TICKP8 bit is located in SYMTICKH<0>.
Units: tick (50 ns). Default value = 0x140 (320 * 50 ns = 16 μs).
REGISTER 2-20: SYMTICKH: SYMBOL PERIOD TICK HIGH BYTE REGISTER (ADDRESS: 0x15)
R/W-0
TXONT6⁽¹⁾
bit 7
R/W-1
TXONT5⁽¹⁾
R/W-0
TXONT4⁽¹⁾
R/W-1
TXONT3⁽¹⁾
R/W-0
TXONT2⁽¹⁾
R/W-0
TXONT1⁽¹⁾
R/W-0
TXONT0⁽¹⁾
R/W-1
TICKP8
bit 0
Legend:
R = Readable bit
-n = Value at POR
W = Writable bit
‘1’ = Bit is set
U = Unimplemented bit, read as ‘0’
‘0’ = Bit is cleared
x = Bit is unknown
bit 7-1
bit 0
TXONT<6:0>: Transmitter Enable On Time Tick bits⁽¹⁾
Transmitter on time before beginning of packet. TXONT is a 9-bit value. The TXONT<8:7> bits are
located in PACON2<1:0>. Units: tick (50 ns). Default value = 0x028 (40 * 50 ns = 2 μs).
TICKP8: Symbol Period Tick bit
Number of ticks to define a symbol period. Tick period is based on the system clock frequency of
20 MHz. TICKP is a 9-bit value. The TICKP<7:0> bits are located in SYMTICKL<7:0>.
Units: tick (50 ns). Default value = 0x140 (320 * 50 ns = 16 μs).
Note 1: Refer to Figure 4-4 for timing diagram.
© 2008 Microchip Technology Inc.
Preliminary
DS39776B-page 29