HT56R666 View Datasheet(PDF) - Holtek Semiconductor
Part Name
Description
MFG CO.
'HT56R666' PDF : 104 Pages View PDF
HT56R66/HT56R666
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.
No.
Options
Oscillator Options
High Oscillator type selection - fM
1. External Crystal Oscillator
1
2. External RC Oscillator
3. Externally supplied clock - internal filter on
4. Externally supplied clock - internal filter off
fSUB clock selection:
2
1. 32768Hz External Oscillator
2. 32K_INT Internal Oscillator
3
fS clock selection: fSUB or fSYS/4
4
XTAL mode selection: 455KHz or 1M~12MHz
5
32768Hz Crystal: enable or disable
PFD Options
6
PA3: normal I/O or PFD output
7
PFD clock selection: Timer/Event Counter 0 or Timer/Event Counter 1
Buzzer Options
8
PA0/PA1: normal I/O or BZ/BZ or PA0=BZ and PA1 as normal I/O
9
Buzzer frequency: fS/22, fS/23, fS/24, fS/25, fS/26, fS/27, fS/28, fS/29
Time Base Option
10
Time base time-out period: 212/fS, 213/fS, 214/fS, 215/fS,
LCD Option
11 LCD type: R or C - HT56R66 only
Watchdog Options
12 Watchdog Timer function: enable or disable
13 CLRWDT instructions: 1 or 2 instructions
14
WDT time-out period: 212/fS~213/fS, 213/fS~214/fS, 214/fS~215/fS, 215/fS~216/fS
LVD/LVR Options
15 LVD function: enable or disable
16 LVR function: enable or disable
17 LVR/LVD voltage: 2.1V/2.2V or 3.15V/3.3V or 4.2V/4.4V
SPI Options
18 SIM pin enable/disable
19 SPI_WCOL: enable/disable
20 SPI_CSEN: enable/disable, used to enable/disable (1/0) software CSEN function
I2C Option
21 I2C debounce Time: no debounce, 1 system clock debounce, 2 system clock debounce
Rev. 1.40
85
May 11, 2012
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