Rainbow Electronics RF22 - Manual (Page 76)

RF22
Version: 0.1 Date: 12/23/2008
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Register 51h. Digital Test Bus Select
Bit D7 D6 D5 D4 D3 D2 D1 D0
Name Reserved ensctest dtb[5:0]
Type R/W R/W R/W
Reset value = 00000000
Bit Name Function
7 Reserved Reserved.
6 ensctest Scan Test Enable.
When set to 1 then GPIO0 will be the ScanEn input.
5:0 dtb[5:0] Digital Test Bus.
GPIO must be configured to Digital Test Mux Output.
Table37. Internal Digital Signals Available on the Digital Test Bus
dtb[4:0] GPIO0 Signal GPIO1 Signal GPIO2 Signal
0 wkup_clk_32k wake-up 32kHz clock rbase_en first divided clock clk_base timebase clock
1 wkup_clk_32k wake-up 32kHz clock wake_up wake-up event tm1sec 1 sec timebase
2 ts_adc_en aux. ADC enable adc_rdy_n aux. ADC conversion
ready
adc_done aux. ADC measurement
done
3 cont_lbd low battery continuous
mode
lbd_on low battery ON signal lbd unfiltered output of LBD
4 div_clk_g gated divided clock uc_clk microcontroller clock ckout_rcsel slow clock selected
5 en_div_sync clock divider enable
(sync'ed)
en_ckout clock out enable en_ckout_s clock out enable
(sync'ed)
6 osc30_en oscillator enable osc30_bias2x oscillator bias control xok chip ready
7 xok chip ready zero_cap cap. load zero osc30_buff_en buffer enable
8 tsadc_needed aux. ADC enable
ext_retran
ext. retransmission
request
tx_mod_gpio TX modulation input
9 gpio_0_oen_n GPIO0 output enable gpio_0_aen GPIO0 analog selection gpio_0_aden GPIO0 ADC input line
enable
10 int_ack1 interrupt acknowledge 1 int_ack2 interrupt acknowledge 2 int_store interrupt latch closed
11 ext_int2 ext. interrupt from
GPIO2
irq_bit8 combined external
status
msk_bit8 combined masked ext.
int.
12 sdo_aux_sel SDO aux. function select sdo_aux SDO aux. signal nirq_aux_sel nIRQ aux. function
select
13 trdata_on_sdi TX/RX data on SDI tx_mod TX modulation input tx_clk_out TX clock output
14 start_full_sync RC osc. full calibration
start
start_fine_sync RC osc. fine calibration
start
xtal_req crystal req. for RC osc.
cal.
15 coarse_rdy RC osc. coarse cal.
ready
fine_rdy RC osc. fine cal. ready xtal_req_sync sync'ed crystal request
16 vco_cal_rst_s_n VCO calibration reset vco_cal VCO calibration is
running
vco_cal_done VCO calibration done
17 vco_cal_en VCO calibration enable en_ref_cnt reference counter
enable
en_freq_cnt_s frequency counter
enable
18 vco_cal_en VCO calibration enable pos_diff positive difference to
goal
en_freq_cnt_s frequency counter
enable
19 dsm_clk_mux DSM multiplexed clock pll_fb_clk_tst PLL feedback clock pll_ref_clk_tst PLL reference clock
20 dsm[0] delta-sigma output dsm[1] delta-sigma output dsm[2] delta-sigma output
21 dsm[3] delta-sigma output pll_fbdiv15 dsm_rst_s_n delta-sigma reset
22 pll_en PLL enable: TUNE state pllt0_ok PLL initial settling OK pllts_ok PLL soft settling OK
23 ch_freq_req frequency change
request
pllts_ok PLL soft settling OK vco_cal_done VCO calibration done
24 vco_cal_en VCO calibration enable pll_vbias_shunt_en VCO bias shunt enable
prog_req
frequency recalculation
req.
25 bandgap_en bandgap enable frac_div_en fractional divider enable buff3_en buffer3 enable
26 pll_pfd_up PFD up signal pll_pfd_down PFD down signal pfd_up_down PFD output change
(XOR'ed)
27 pll_lock_detect PLL lock detect pll_en PLL enable: TUNE state pllt0_ok PLL initial settling OK
28 pll_en PLL enable: TUNE state pll_lock_detect PLL lock detect pllts_ok PLL soft settling OK