MB90570A 데이터 시트보기 (PDF) - Fujitsu

부품명

상세내역

제조사

MB90570A

16-bit Proprietary Microcontroller

Fujitsu 

MB90570A/570C Series

The series without built-in step-down circuit have no oscillation setting time of step-down circuit, so outputs

should not become indeterminate. (MB90F574A,MB90574C)

Timing chart of indeterminate outputs from ports 0 and 1

Oscillation setting time *2

VCC (power-supply pin)

PONR (power-on reset) signal

RST (external asynchronous reset) signal

RST (internal reset) signal

Oscillation clock signal

KA (internal operating clock A) signal

KB (internal operating clock B) signal

PORT (port output) signal

Step-down circuit setting time *1

Period of indeterminate

*1: Step-down circuit setting time 217/oscillation clock frequency (oscillation clock frequency of 16 MHz: 8.19 ms)

*2: Oscillation setting time

218/oscillation clock frequency (oscillation clock frequency of 16 MHz: 16.38 ms)

12. Initialization

In the device, there are internal registers which are initialized only by a power-on reset. Turn on the power again

to initialize these registers.

13. Return from standby state

If the power-supply voltage goes below the standby RAM holding voltage in the standby state, the device may

fail to return from the standby state. In this case, reset the device via the external reset pin to return to the normal

state.

14. Precautions for Use of ’DIV A, Ri,’ and ’DIVW A, Ri’ Instructions

The signed multiplication-division instructions ’DIV A, Ri,’ and ’DIVW A, RWi’ should be used when the corre-

sponding bank registers (DTB, ADB, USB, SSB) are set to value ’00h.’ If the corresponding bank registers (DTB,

ADB, USB, SSB) are set to a value other than ’00h,’ then the remainder obtained after the execution of the

instruction will not be placed in the instruction operand register.

15. Precautions for Use of REALOS

Extended intelligent I/O service (EI2OS) cannot be used, when REALOS is used.

16. Caution on PLL Clock Mode

If the PLL clock mode is selected, the microcontroller attempt to be working with the self-oscillating circuit even

when there is no external oscillator or external clock input is stopped. Performance of this operation, however,

cannot be guaranteed.

18

DS07-13701-9E

Share Link: