SB16C1058_Data Sheet_EN
SB16C1058
OCTAL UART WITH 256-BYTE FIFO
JULY 2013 REV 1.04
43
1 : Interrupt Non-masking. Global interrupt is generated
when the value of GISR[0] is ‘1’.
7.13 Global Interrupt Status Register (GISR, Page 2)
GISR is a register that internal eight 16C1050 UARTs share to use. It is used to verify the
generation status of each interrupt of eight 16C1050 UARTs when global interrupt
function is enabled. Table 18 shows GISR bit settings.
Table 18: Global Interrupt Status Register Description
Bit
Symbol
Description
7
GISR[7]
8
th
UART Interrupt Status.
0 : Interrupt of 8
th
UART channel was not generated.
1 : Interrupt of 8
th
UART channel was generated.
6
GISR[6]
7
th
UART Interrupt Status.
0 : Interrupt of 7
th
UART channel was not generated.
1 : Interrupt of 7
th
UART channel was generated.
GISR[5]
6
th
UART Interrupt Status.
0 : Interrupt of 6
th
UART channel was not generated.
1 : Interrupt of 6
th
UART channel was generated.
4
GISR[4]
5
th
UART Interrupt Status.
0 : Interrupt of 5
th
UART channel was not generated.
1 : Interrupt of 5
th
UART channel was generated.
3
GISR[3]
4
th
UART Interrupt Status.
0 : Interrupt of 4
th
UART channel was not generated.
1 : Interrupt of 4
th
UART channel was generated.
2
GISR[2]
3
rd
UART Interrupt Status.
0 : Interrupt of 3
rd
UART channel was not generated.
1 : Interrupt of 3
rd
UART channel was generated.
1
GISR[1]
2
nd
UART Interrupt Status.
0 : Interrupt of 2
nd
UART channel was not generated.
1 : Interrupt of 2
nd
UART channel was generated.
0
GISR[0]
1
st
UART Interrupt Status.
0 : Interrupt of 1
st
UART channel was not generated.
1 : Interrupt of 1
st
UART channel was generated.
7.14 Transmit FIFO Count Register (TCR, Page 2)
TCR shows the number of characters that can be stored in TX FIFO. In 64-byte FIFO
mode, it consists of only TCR[6:0]. If the number of characters that can be stored in TX
FiFO is 0, it is shown as ‘0000_0000’ and if 64, it is shown as ‘0100_0000’. In 256-byte
FIFO mode, it consists of ISR[7] + TCR[7:0]. If the number of characters that can be
stored in TX FiFO is 0, it is shown as ‘0_0000_0000’ and if 255, it is shown as
‘0_1111_1111’. And in case of the maximum number 256, it is shown as ‘1_0000_0000’.