Manualshelf

Datasheet

ManualsBrandsSeeed Studio ManualsDevelopment Boards & KitsGrove - Red LED Matrix with Driver
11121314151617181920
Rev. 1.10 8 May 16, 2011 Rev. 1.10 9 May 16, 2011
HT16K33
RAM Mapping 16*8 LED Controller Driver with keyscan
Wake-up
●
Wake-up by a key press from any key or by setting the “S” bit of the system setup register to “1”.
A key scan will then be performed.
●
The System Oscillator restarts for normal operation.
●
The previous display data output will be updated by Each Mode command set.
●
The relationship between the Wake-up and any key press is shown as follows:
Wake-up
Standby mode command
set from MCU
Read key data command
set from MCU
INT flag or INT pin output
Any key
Press
Release key
2 frame cycle
Normal active status
HT16K33 operation status
Standby status
Press
2 frame cycle
< 2 frame cycle
Release key
Normal active status
Press
Release
(When the act bit is set to “1”)
1. Key data are updated
2. Slave address are updated
1. Key data are updated
2. Slave address are updated
When after the key data has been
read,Clears the key data RAM.
When after the key data has been
read,Clears the key data RAM.
●
In the sleep mode, KS0-K1 or KS1-K1 can not wake-up the device when the KS2-K1 keys are
kept pressed down. It is a prohibited application as shown in the following gure.