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BCM43455 Datasheet, PDF (143/159 Pages) Cypress Semiconductor – Single-Chip 5G WiFi IEEE 802.11ac MAC/Baseband/ Radio with Integrated Bluetooth 4.1 and FM Receiver | |||
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BCM43455 Preliminary Data Sheet
SDIO Bus Timing Specifications in SDR Modes
Clock Timing
Figure 36: SDIO Clock Timing (SDR Modes)
tCLK
SDIO_CLK
tCR
tCF
tCR
SDIO Timing
Parameter
â
â
Clock duty
cycle
Table 55: SDIO Bus Clock Timing Parameters (SDR Modes)
Symbol
tCLK
tCR, tCF
â
Minimum
40
20
10
4.8
â
Maximum
â
â
â
â
0.2 Ã tCLK
Unit
ns
ns
ns
ns
ns
30
70
%
Comments
SDR12 mode
SDR25 mode
SDR50 mode
SDR104 mode
tCR, tCF < 2.00 ns (max) @ 100 MHz,
CCARD = 10 pF
tCR, tCF < 0.96 ns (max) @ 208 MHz,
CCARD = 10 pF
â
Broadcom®
November 5, 2015 ⢠43455-DS109-R
BROADCOM CONFIDENTIAL
Page 142
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