H49R50A-1 Datasheet, PDF (22/45 Pages) Holtek Semiconductor Inc – LCD Type 8-Bit MCU

COM 0
COM 1
COM 2
COM 3
L C D s e g m e n ts O N
C O M 2 s id e lig h te d
HT49R50A-1/HT49C50-1/HT49C50L
VA
VB
VC
VSS
VA
VB
VC
VSS
VA
VB
VC
VSS
VA
VB
VC
VSS
VA
VB
VC
VSS
N o te : 1 /4 d u ty , 1 /3 b ia s , C ty p e : " V A " 3 /2 V L C D , " V B " V L C D , " V C " 1 /2 V L C D
1 /4 d u ty , 1 /3 b ia s , R ty p e : " V A " V L C D , " V B " 2 /3 V L C D , " V C " 1 /3 V L C D
1 /3 b ia s o n ly fo r H T 4 9 R 5 0 A - 1 /H T 4 9 C 5 0 - 1
LCD Driver Output (1/4 Duty, 1/3 Bias, C Type)
The RTCC register definitions are listed in the table on the next page.
Bit No.
0~2
3
4
5
6, 7
Label Read/Write
RT0~RT2
R/W
LVDC*
R/W
QOSC
R/W
LVDO*
R
¾
¾
Reset
111B
0
0
0
¾
Function
8 to 1 multiplexer control inputs to select the real clock prescaler
output
LVD enable/disable (1/0)
32768Hz OSC quick start-up oscillating
0/1: quickly/slowly start
LVD detection output (1/0)
1: low voltage detected
Unused bit, read as ²0²
Note: ²*² For HT49R50A-1/HT49C50-1
RTCC (09H) Register
Rev. 2.00
22
November 29, 2005