SI4739-B20-GMR Datasheet, PDF (7/24 Pages) Silicon Laboratories – BROADCAST MULTI-BAND RADIO RECEIVER

Si473x-B20
Table 4. Reset Timing Characteristics^1,2
(V_DD = 2.7 to 5.5 V, V_IO = 1.5 to 3.6 V, T_A = –20 to 85 °C)
Parameter
Symbol
Min
Typ
Max
Unit
RST Pulse Width and GPO1, GPO2/INT Setup to RST^
t_SRST
100
—
—
µs
GPO1, GPO2/INT Hold from RST
t_HRST
30
—
—
ns
Important Notes:
1. When selecting 2-wire mode, the user must ensure that a 2-wire start condition (falling edge of SDIO while SCLK is
high) does not occur within 300 ns before the rising edge of RST.
2. When selecting 2-wire mode, the user must ensure that SCLK is high during the rising edge of RST, and stays high until
after the first start condition.
3. If GPO1 and GPO2 are actively driven by the user, then minimum t_SRST is only 30 ns. If GPO1 or GPO2 is hi-Z, then
minimum t_SRST is 100 µs to provide time for on-chip 1 M devices (active while RST is low) to pull GPO1 high and
GPO2 low.
RST 70%
30%
t_SRST
t_HRST
GPO1 70%
30%
GPO2/ ^70%
INT ^30%
Figure 1. Reset Timing Parameters for Busmode Select
Rev. 0.5
7