UPD78F0890GK(A)-GAJ-AX NEC, UPD78F0890GK(A)-GAJ-AX Datasheet - Page 250

• Manufacturer Part Number: UPD78F0890GK(A)-GAJ-AX
• Description: 8BIT MCU, 128K FLASH, 7K RAM, LQFP
• Manufacturer: NEC

Specifications of UPD78F0890GK(A)-GAJ-AX

• Controller Family/series: UPD78F
• No. Of I/o's: 55
• Ram Memory Size: 7KB
• Cpu Speed: 20MHz
• No. Of Timers: 10
• No. Of Pwm: RoHS Compliant
• Core Size: 8bit
• Program Memory Size: 128KB
• Oscillator Type: External, Internal

(2) Timing chart
250
8-bit timer counter Hn
<1> The count operation is enabled by setting the TMHEn bit to 1. The count clock starts counting no more than
<2> When the values of 8-bit timer counter Hn and the CMP0n register match, the value of 8-bit timer counter Hn
<3> The INTTMHn signal and TOHn output become inactive by clearing the TMHEn bit to 0 during timer Hn
The timing of the interval timer/square-wave output operation is shown below.
Remark n = 0, 1
Count clock
1 clock after the operation is enabled.
is cleared, the TOHn output level is inverted, and the INTTMHn signal is output.
operation. If these are inactive from the first, the level is retained.
INTTMHn
TMHEn
CMP0n
TOHn
N = 01H to FEH
Figure 9-10. Timing of Interval Timer/Square-Wave Output Operation (1/2)
<1>
00H
Count start
01H
CHAPTER 9 8-BIT TIMERS H0 AND H1
User’s Manual U17554EJ4V0UD
match interrupt occurrence,
8-bit timer counter Hn clear
(a) Basic operation
Level inversion,
N
N
<2>
Clear
00H
01H
Interval time
match interrupt occurrence,
8-bit timer counter Hn clear
Level inversion,
N
<2>
Clear
00H
01H 00H
<3>