- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report Inappropriate Content
Hi everyone,
About HCI_UART pins (D7,C7,E6,D6),
・Pin state at reset (whether pull-up/down is present or not)
・Normal terminal status (whether pull-up/down is present or not)
Could you please give me some advice.
Thanks,
Yang
Solved! Go to Solution.
- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report Inappropriate Content
Hi,
The functionalities of each pins are mentioned in the datasheet itself as in the attached picture by you.
E6 and D6 are Output pins and pull-up configured, in any case. Similarly, C7 is an Input pin and it has also a pull-up.
D7 is floating, meaning the state in indeterminate, since there is no pull-up/down. And, RXD (D7) is an input pin and it is expected to have inputs.
Whereas, If you look at the GPIO pins, you can see that all have Input or Output functionality. But no pull-up/down. So in the datasheet, it is mentioned separately, that:-.
"When RST_N = 0 (during reset), all GPIOs (P0 to P39) are input-pins, no pull-up/pull-down and input-disabled.
In auto-baud (RST_N=1 and no FW programming), all GPIOs (P0 to P39) are input-pins and no pull-up/pull-down. Input signals are allowed to pass."
Thanks,
-Dheeraj
- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report Inappropriate Content
- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report Inappropriate Content
Hi Dheeraj,
Thank you for your cooperation.
Is the following understanding about pin status correct?
・When reset, pin state -> Low
・When normal, pin state -> Low
Thanks,
Yang
- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report Inappropriate Content
Hi
Sorry, I will change the confirmation.
Is the following understanding correct?
・When reset, pin state
D7->what state?
C7->PullUp
E6 -> PullUp
D6ー>PullUp
・When normal, pin state
D7->what state?
C7->PullUp
E6 -> PullUp
D6ー>PullUp
If I make a mistake, please tell me clearly.
Thanks,
Yang
- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report Inappropriate Content
Hi Dheeraj
How is the state of progress?
I’d like for you to update me on this case.
Thanks,
Yang
- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report Inappropriate Content
Add Information
Table 4. 62-pin FBGA and 112-pin FBGA Pin Assignments (Cont.)
Does PU mean pull-up according to the database of CYW20819?
Thnaks,
Yang
- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report Inappropriate Content
HI,
Sorry for the delay. Also i am correcting myself.
The HCI pins C7, E6, D6 are internally pulled-up (PU). The pin D7 a floating pin (state is indeterminate).
Thanks,
-Dheeraj
- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report Inappropriate Content
Hi
Could you please answer below information?
Is the following understanding correct?
・When reset, pin state
D7->what state??
C7->PullUp
E6 -> PullUp
D6ー>PullUp
・When normal, pin state
D7->what state??
C7->PullUp
E6 -> PullUp
D6ー>PullUp
Thanks,
Yang
- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report Inappropriate Content
Hi,
The functionalities of each pins are mentioned in the datasheet itself as in the attached picture by you.
E6 and D6 are Output pins and pull-up configured, in any case. Similarly, C7 is an Input pin and it has also a pull-up.
D7 is floating, meaning the state in indeterminate, since there is no pull-up/down. And, RXD (D7) is an input pin and it is expected to have inputs.
Whereas, If you look at the GPIO pins, you can see that all have Input or Output functionality. But no pull-up/down. So in the datasheet, it is mentioned separately, that:-.
"When RST_N = 0 (during reset), all GPIOs (P0 to P39) are input-pins, no pull-up/pull-down and input-disabled.
In auto-baud (RST_N=1 and no FW programming), all GPIOs (P0 to P39) are input-pins and no pull-up/pull-down. Input signals are allowed to pass."
Thanks,
-Dheeraj
- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report Inappropriate Content
Hi,
>When RST_N = 0 (during reset), all GPIOs (P0 to P39) are input-pins, no pull-up/pull-down and input-disabled.
Are all GPIOs (P0 to P39) in HI/Z state?
I think HCI_UART pins(D7,C7,E6,D6)are also in HI/Z state, is that correct?
Thanks,
Yang
- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report Inappropriate Content
Hi,
- Are all GPIOs (P0 to P39) in HI/Z state?
Since there is no pull-up/down we can consider all these pins are in Hi-Z state.
- I think HCI_UART pins(D7,C7,E6,D6)are also in HI/Z state, is that correct?
Only D7 is floating (Hi-Z state). Others are connected to pull-up.
Thanks,
-Dheeraj