em78f644nso28s ELAN Microelectronics Corp, em78f644nso28s Datasheet - Page 70

• Manufacturer Part Number: em78f644nso28s
• Description: Flash Series 8-bit Microcontroller
• Manufacturer: ELAN Microelectronics Corp

EM78F648/644/642/641/548/544/542/541N
8-Bit Microcontroller
60 •
Bit 3 (PSTE):
Bits 2~0 (PST2~PST0): TCC Prescaler bits
6.3.17 Bank0 R14: TCCDATA (TCC Data Register)
Increase by an external signal edge through the TCC pin, or by the instruction cycle
clock. External signal of TCC trigger pulse width must be greater than one instruction.
The signals to increase the counter are determined by Bit 4 and Bit 5 of the TCCCR
register. This register is writable and readable as any other registers.
6.3.18 Bank0 R15~R19 (IOCR5~IOCR9)
These registers are used to control I/O port direction. They are both readable and
writable.
6.3.19 Bank0 R1A~R1B (Not Used)
6.3.20 Bank0 R1C: IMR1 (Interrupt Mask Register 1)
Bits 7 (LVDIE): LVDIF interrupt enable bit
Bit 6:
Bit 5 (SPIE):
LVDIE
Bit 7
Bit 6
0
Prescaler enable bit for TCC
0: Prescaler disabled, TCC rate is 1:1
1: Prescaler enabled, TCC rate is set as Bits 2~0.
0: Set the relative I/O pin as output
1: Set the relative I/O pin into high impedance
0: Disable LVDIF interrupt
1: Enable LVDIF interrupt
Not used, fixed to “0” all the time.
Interrupt enable bit
0: Disable SPIF interrupt
1: Enable SPIF interrupt
PST2
0
0
0
0
1
1
1
1
SPIE
Bit 5
PST1
0
0
1
1
0
0
1
1
PWMBIE
Bit 4
(This specification is subject to change without further notice)
PST0
0
1
0
1
0
1
0
1
PWMAIE
Bit 3
Product Specification (V1.0) 05.05.2010
TCC Rate
1:2
1:4
1:8
1:16
1:32
1:64
1:128
1:256
EXIE
Bit 2
Bit 1
ICIE
TCIE
Bit 0