W741E260 Datasheet, PDF (25/94 Pages) Winbond – 4-BIT FLASH MICROCONTROLLER

W741E260
Hold Mode Release Enable Flag (HEF)
The hold mode release enable flag is organized as an 8-bit binary register (HEF.0 to HEF.7). The HEF
is used to control the hold mode release conditions. It is controlled by the MOV HEF, #I instruction. The
bit descriptions are as follows:
76543210
HEF w
w
www
Note: W means write only.
HEF.0 = 1 Overflow from the Divider 0 causes Hold mode to be released.
HEF.1 = 1 Underflow from Timer 0 causes Hold mode to be released.
HEF.2 = 1 Signal change at port RC causes Hold mode to be released.
HEF.3 is reserved.
HEF.4 = 1 Overflow from the Divider 1 causes Hold mode to be released for W741C260 body.
Falling edge signal at the INT pin causes Hold mode to be released for W741C250 body.
HEF.5 & HEF.6 are reserved.
HEF.7 = 1 Underflow from Timer 1 causes Hold mode to be released.
Hold Mode Release Condition Flag (HCF)
The hold mode release condition flag is organized as a 8-bit binary register (HCF.0 to HCF.7). It
indicates by which interrupt source the hold mode has been released, and is loaded by hardware. The
HCF can be read out by the MOVA R, HCFL and MOVA R, HCFH instructions. When any of the HCF
bits is "1," the hold mode will be released and the HOLD instruction is invalid. The HCF can be reset by
the CLR EVF or MOV HEF, #I (HEF = 0) instructions. When EVF and HEF have been reset, the
corresponding bit of HCF is reset simultaneously. The bit descriptions are as follows:
76543210
HCF
RR
RRR
Note: R means read only.
HCF.0 = 1 Hold mode was released by overflow from the divider 0.
HCF.1 = 1 Hold mode was released by underflow from the timer 0.
HCF.2 = 1 Hold mode was released by a signal change at port RC.
HCF.3 is reserved.
HCF.4 = 1 Hold mode was released by overflow from the divider 1 for W741C260 body.
Hold mode was released by a falling edge signal at the INT pin for W741C250 body.
HCF.5 = 1 Hold mode was released by underflow from the timer 1.
HCF.6 and HCF.7 are reserved.
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Publication Release Date: March 1998
Revision A2