SS1621B-48LQFP Shenzhen SI Semiconductors Co., LTD., SS1621B-48LQFP Datasheet - Page 15

• Manufacturer Part Number: SS1621B-48LQFP
• Description: RAM Mapping 32 X 4 LCD Controller for I/O uC
• Manufacturer: Shenzhen SI Semiconductors Co., LTD.

F4
F8
F16
F32
F64
F128
TEST
NORMAL
Note: X: Don’t care
indicates the command mode ID. If successive commands have been issued, the command mode ID
except for the first command will be omitted. The source of the tone frequency and of the time
base/WDT clock frequency can be derived from an on-chip 256kHz RC oscillator, a 32.768kHz
crystal oscillator, or an external 256kHz clock. Calculation of the frequency is based on the system
frequency sources as stated above. It is recommended that the host controller should initialize the
SS1621 after power on reset, for power on reset may fail, which in turn leads to the malfunctioning
of the SS1621.
All the bold forms, namely 1 1 0, 1 0 1, and 1 0 0 , are mode commands. Of these, 1 0 0
A5~A0: RAM addresses
D3~D0: RAM data
D/C: Data/command mode
Def.: Power on reset default
Name
1 0 0 101X-X010-X
1 0 0 101X-X011-X
1 0 0 101X-X100-X
1 0 0 101X-X101-X
1 0 0 101X-X110-X
1 0 0 101X-X111-X
1 0 0 1110-0000-X
1 0 0 1110-0011-X
ID
Command Code
p. 15
D/C
C
C
C
C
C
C
C
C
The WDT time-out flag after: 2s
Time base/WDT clock
Output: 4Hz
The WDT time-out flag after: 1s
Time base/WDT clock
Output: 8Hz
The WDT time-out flag after: 1/2s
Time base/WDT clock
Output: 16Hz
The WDT time-out flag after: 1/4s
Time base/WDT clock
Output: 32Hz
The WDT time-out flag after: 1/8s
Time base/WDT clock
Output: 64Hz
The WDT time-out flag after: 1/16s
Time base/WDT clock
Output: 128Hz
The WDT time-out flag after: 1/32s
Function
Last update: 2008-06-03 04:36
SS1621
Def.
Yes
Yes