EM78P156N
OTP ROM
| VCC |
|
|
|
|
| D | P | Q |
| IRQn |
| R |
| |||
/IRQn | CLK |
| _ |
| INT |
|
| C | Q | RFRD | IRQm |
|
| L |
|
|
|
RF
|
|
|
| ENI/DISI |
| Q | P | D | IOD |
| R | |||
| _ | C | CLK | IOCFWR |
| Q |
| ||
IOCF | L |
|
| |
|
|
|
/RESET
IOCFRD
RFWR
Fig. 10 Interrupt Input Circuit4.7Oscillator1.Oscillator ModesThe EM78P156N can be operated in three different oscillator modes, such as External RC oscillator mode (ERC), High XTAL oscillator mode (HXT), and Low XTAL oscillator mode (LXT). User can select one of them by programming OSC and HLF in the CODE option register. Table 6 depicts how these three modes are defined.
The
Mode | OSC | HLF | HLP |
|
|
|
|
ERC(External RC oscillator mode) | 0 | *X | *X |
HXT(High XTAL oscillator mode) | 1 | 1 | *X |
LXT(Low XTAL oscillator mode) | 1 | 0 | 0 |
<Note> 1. X, Don’t care
2.The transient point of system frequency between HXT and LXY is around 400 KHz.
This specification is subject to change without prior notice. 26 | 07.29.2004 (V1.2) |