HT56R66 Holtek Semiconductor Inc., HT56R66 Datasheet - Page 85

• Manufacturer Part Number: HT56R66
• Description: Tinypower Tm A/d Type With Lcd 8-bit Otp Mcu
• Manufacturer: Holtek Semiconductor Inc.

Rev. 1.10
Configuration Options
Configuration options refer to certain options within the MCU that are programmed into the device during the program-
ming process. During the development process, these options are selected using the HT-IDE software development
tools. As these options are programmed into the device using the hardware programming tools, once they are selected
they cannot be changed later as the application software has no control over the configuration options. All options must
be defined for proper system function, the details of which are shown in the table.
Oscillator Options
PFD Options
Buzzer Options
Time Base Option
LCD Option
Watchdog Options
SPI Options
I
LVD/LVR Options
2
C Option
No.
10
11
12
13
14
15
16
17
18
19
20
21
1
2
3
4
5
6
7
8
9
High Oscillator type selection - f
1. External Crystal Oscillator
2. External RC Oscillator
3. Externally supplied clock - internal filter on
4. Externally supplied clock - internal filter off
f
1. 32768Hz External Oscillator
2. 32K_INT Internal Oscillator
f
XTAL mode selection: 455KHz or 1M~12MHz
32768Hz Crystal: enable or disable
PA3: normal I/O or PFD output
PFD clock selection: Timer/Event Counter 0 or Timer/Event Counter 1
PA0/PA1: normal I/O or BZ/BZ or PA0=BZ and PA1 as normal I/O
Buzzer frequency: f
Time base time-out period: 2
LCD type: R or C - HT56R66 only
Watchdog Timer function: enable or disable
CLRWDT instructions: 1 or 2 instructions
WDT time-out period: 2
LVD function: enable or disable
LVR function: enable or disable
LVR/LVD voltage: 2.1V/2.2V or 3.15V/3.3V or 4.2V/4.4V
SIM pin enable/disable
SPI_WCOL: enable/disable
SPI_CSEN: enable/disable, used to enable/disable (1/0) software CSEN function
I
SUB
S
2
C debounce Time: no debounce, 1 system clock debounce, 2 system clock debounce
clock selection: f
clock selection:
SUB
S
/2
or f
2
, f
12
/f
S
SYS
/2
S
~2
3
/4
, f
12
13
/f
S
/f
/2
S
M
, 2
S
4
, 2
, f
13
S
13
/f
/2
/f
S
5
, 2
S
, f
~2
14
S
/2
14
/f
85
/f
S
6
, f
, 2
S
, 2
Options
S
15
/2
14
/f
7
/f
, f
S
,
S
S
~2
/2
15
8
, f
/f
S
S
, 2
/2
9
15
/f
S
~2
16
/f
S
HT56R66/HT56R666
September 8, 2009