HD404364 查看數據表（PDF） - Renesas Electronics

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HD404364

4-bit HMCS400-Series microcomputer

Renesas Electronics 

HD404369 Series

Miscellaneous register (MIS: $00C)

Bit

Initial value

Read/Write

Bit name

3

0

W

MIS3

2

0

W

MIS2

1

0

W

MIS1

0

0

W

MIS0

MIS3 MIS2

Buffer control.

Refer to figure 34.

MIS1

0

0

1

1

MIS0

0

1

0

1

T*1

tRC* 1 Oscillation Circuit Conditions

0.24414 ms 0.12207 ms External clock input

0.24414 ms* 2

15.625 ms 7.8125 ms Ceramic oscillator

125 ms

62.5 ms

Crystal oscillator

Not used

—

Notes: 1. The values of T and tRC are applied when a 32.768-kHz crystal oscillator is used.

2. The value is applied only when direct transfer operation is used.

Figure 15 Miscellaneous Register (MIS)

STOP/SBY instruction execution

Subactive mode

MCU internal

processing period

(Set LSON = 0, DTON = 1)

Oscillation

stabilization

time

Active mode

Interrupt strobe

Direct transfer

completion timing

T

t RC

TD

T: Interrupt frame length

tRC: Oscillation stabilization period

tD: Transition time

Figure 16 Direct Transition Timing

Stop Mode Cancellation by STOPC: The MCU enters active mode from stop mode by inputting STOPC

as well as by RESET. In either case, the MCU starts instruction execution from the starting address

(address 0) of the program. However, the value of the RAM enable flag (RAME: $021, bit 3) differs

between cancellation by STOPC and by RESET. When stop mode is cancelled by RESET, RAME = 0;

when cancelled by STOPC, RAME = 1. RESET can cancel all modes, but STOPC is valid only in stop

mode; STOPC input is ignored in other modes. Therefore, when the program requires to confirm that stop

mode has been cancelled by STOPC (for example, when the RAM contents before entering stop mode is

33

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